Graco Heat Pump 332339B User Manual

Instructions-Parts  
332339B  
Dosing Pumps  
EN  
To pressurize and proportion fluid in a ProMix® PD2K Electronic Positive Displacement Proportioning  
System.  
For professional use only.  
Important Safety Instructions  
Read all warnings and instructions in this manual  
and in your PD2K proportioner manual. Save these  
instructions.  
See page 2 for model part numbers and  
information.  
PROVEN QUALITY. LEADING TECHNOLOGY.  
 
Warnings  
The following warnings are for the setup, use, grounding, maintenance and repair of this equipment. The  
exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific  
risks. When these symbols appear in the body of this manual or on warning labels, refer back to these  
Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout  
the body of this manual where applicable.  
WARNING  
FIRE AND EXPLOSION HAZARD  
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help  
prevent fire and explosion:  
• Use equipment only in well ventilated area.  
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and  
plastic drop cloths (potential static arc).  
• Keep work area free of debris, including solvent, rags and gasoline.  
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable  
fumes are present.  
• Ground all equipment in the work area. See Grounding instructions.  
• Use only grounded hoses.  
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless  
they are antistatic or conductive.  
Stop operation immediately if static sparking occurs or you feel a shock, Do not use  
equipment until you identify and correct the problem.  
• Keep a working fire extinguisher in the work area.  
SKIN INJECTION HAZARD  
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may  
look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical  
treatment.  
• Do not spray without tip guard and trigger guard installed.  
• Engage trigger lock when not spraying.  
• Do not point gun at anyone or at any part of the body.  
• Do not put your hand over the spray tip.  
• Do not stop or deflect leaks with your hand, body, glove, or rag.  
• Follow the Pressure Relief Procedure when you stop spraying/dispensing and before  
cleaning, checking, or servicing equipment.  
• Tighten all fluid connections before operating the equipment.  
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.  
332339B  
3
 
 
WARNING  
MOVING PARTS HAZARD  
Moving parts can pinch, cut or amputate fingers and other body parts.  
• Keep clear of moving parts.  
• Do not operate equipment with protective guards or covers removed.  
• Pressurized equipment can start without warning. Before checking, moving, or servicing  
equipment, follow the Pressure Relief Procedure and disconnect all power sources.  
TOXIC FLUID OR FUMES  
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin,  
inhaled, or swallowed.  
• Read MSDSs to know the specific hazards of the fluids you are using.  
• Store hazardous fluid in approved containers, and dispose of it according to applicable  
guidelines.  
• Always wear chemically impermeable gloves when spraying, dispensing, or cleaning  
equipment.  
PERSONAL PROTECTIVE EQUIPMENT  
Wear appropriate protective equipment when in the work area to help prevent serious injury,  
including eye injury, hearing loss, inhalation of toxic fumes, and burns. This protective  
equipment includes but is not limited to:  
• Protective eyewear, and hearing protection.  
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent  
manufacturer.  
EQUIPMENT MISUSE HAZARD  
Misuse can cause death or serious injury.  
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.  
• Do not exceed the maximum working pressure or temperature rating of the lowest rated  
system component. See Technical Data in all equipment manuals.  
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data  
in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete  
information about your material, request MSDS from distributor or retailer.  
• Do not leave the work area while equipment is energized or under pressure.  
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.  
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine  
manufacturer’s replacement parts only.  
• Do not alter or modify equipment. Alterations or modifications may void agency approvals  
and create safety hazards.  
• Make sure all equipment is rated and approved for the environment in which you are using it.  
• Use equipment only for its intended purpose. Call your distributor for information.  
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.  
• Do not kink or over bend hoses or use hoses to pull equipment.  
• Keep children and animals away from work area.  
• Comply with all applicable safety regulations.  
4
332339B  
 
Setup  
Pump Components  
Component  
Description  
Stepper Motor  
Driver  
A
B
C
D
E
F
G
H
J
Pump Lower  
Up Inlet Dose Valve  
Down Inlet Dose Valve  
Up Outlet Dose Valve  
Down Outlet Dose Valve  
Fluid Outlet Manifold  
Fluid Inlet Check Valve  
Fluid Inlet Manifold  
K
L
Fluid Outlet Check  
Valve  
M
N
P
R
S
T
Fluid Outlet Pressure  
Sensor  
Cable Connection to  
Pump Control Module  
Fluid Inlet Pressure  
Gauge  
Fluid Outlet Fitting (1/4  
npt(m)  
Figure 3 Pump Components  
Fluid Inlet Fitting (1/4  
npt(m)  
Jam Nuts, for mounting  
pump  
332339B  
5
 
   
Air Connections  
Red and green 5/32 in. (4 mm) tubing connects the  
solenoid manifold to the pump’s dosing valves. See  
the Pump Tubing Schematic on the next page.  
NOTE: Tubing lengths must be 18 in. ± 1/2 in. (457  
mm ± 13 mm) for all connections. Always use equal  
lengths of tubing, to balance the timing of the valves.  
Lengths longer than 18 in. (457 mm) will increase  
valve response time.  
1. On the bottom of the solenoid manifold are four  
ports with tube fittings: UP OPEN, UP CLOSED,  
DOWN OPEN, and DOWN CLOSED. These  
ports provide air to open and close the pump’s  
inlet dosing valves.  
Figure 5 Inlet Manifold Tubing Connections  
2. On the side of the solenoid manifold are four  
ports with 90° tube fittings (not shown): UP  
OPEN, UP CLOSED, DOWN OPEN, and DOWN  
CLOSED. These ports provide air to open and  
close the pump’s outlet dosing valves.  
Figure 6 Tubing Connections at Solenoid  
Manifold, to Pump Outlet Manifold  
Figure 4 Tubing Connections at Solenoid  
Manifold, to Pump Inlet Manifold  
a. Connect green tubing (G) from the UP OPEN  
fitting to the 90° tube fitting on the side of the  
OUTLET UP dosing valve.  
a. Connect green tubing (G) from the UP OPEN  
fitting to the 90° tube fitting on the side of the  
INLET UP dosing valve.  
b. Connect red tubing (R) from the UP CLOSED  
fitting to the 90° tube fitting on the end of the  
OUTLET UP dosing valve.  
b. Connect red tubing (R) from the UP CLOSED  
fitting to the 90° tube fitting on the end of the  
INLET UP dosing valve.  
c. Connect green tubing (G) from the DOWN  
OPEN fitting to the 90° tube fitting on the side  
of the INLET DOWN dosing valve.  
d. Connect red tubing (R) from the DOWN  
CLOSED fitting to the 90° tube fitting on the  
end of the INLET DOWN dosing valve.  
Figure 7 Outlet Manifold Tubing Connections  
6
332339B  
 
 
c. Connect green tubing (G) from the DOWN  
OPEN fitting to the 90° tube fitting on the side  
of the OUTLET DOWN dosing valve.  
See the following table to understand the relationship  
between pump stroke and dose valve actuation.  
Table 1 Dose Valve Actuation  
d. Connect red tubing (R) from the DOWN  
CLOSED fitting to the 90° tube fitting on the  
end of the OUTLET DOWN dosing valve.  
Pump  
Stroke  
Up Inlet  
Valve  
Down  
Inlet  
Valve  
Up  
Outlet  
Valve  
Down  
Outlet  
Valve  
3. Repeat these steps for each pump in your  
system.  
Up  
Open  
Closed  
Open  
Open  
Closed  
Open  
Down  
Closed  
Closed  
EXH  
UP  
OPEN  
INLET UP  
G
R
G
CLOSED  
OPEN  
R
OUTLET UP  
CLOSED  
DOWN  
EXH  
OPEN  
INLET DOWN  
G
R
G
CLOSED  
OPEN  
R
OUTLET DOWN  
CLOSED  
Figure 8 Pump Tubing Schematic  
332339B  
7
 
Fluid Connections  
Electrical Connection  
NOTICE  
1. Connect a 1/4 npt(f) fluid hose from the fluid  
source to the check valve (J) at the pump’s fluid  
inlet manifold (K). The inlet dose valves (D, E)  
will open and close alternately at the pump stroke  
changeover, to maintain a steady flow into the  
pump.  
To avoid electrical component damage, remove all  
system power before plugging any connectors.  
Connect the cable from the pump control module in  
the proportioner’s electrical control box to the cable  
connector (N) on the pump motor (A).  
2. Connect a 1/4 npt(f) fluid outlet hose from the  
check valve (L) at the pump’s fluid outlet manifold  
(H). The outlet dose valves (F, G) will open and  
close alternately at the pump stroke changeover,  
to maintain a steady flow out of the pump.  
The cable has two connectors, one for the motor  
control and the other for encoder feedback. The  
connectors are keyed differently to ensure correct  
installation.  
Figure 9 Fluid Connections  
8
332339B  
 
   
Repair  
Preventive Maintenance Schedule  
6. Disconnect all air and fluid lines from the dosing  
valves and manifolds. Be sure to label the lines  
to ensure they are re-connected correctly.  
The operating conditions of your particular system  
determine how often maintenance is required.  
Establish a preventive maintenance schedule by  
recording when and what kind of maintenance is  
needed, and then determine a regular schedule for  
checking your system.  
7. Pull the lower away from the driver.  
a. To service the driver, see  
b. To service the lower, see  
Disconnect the Lower from the Driver  
This equipment stays pressurized until pressure  
is manually relieved. To help prevent serious  
injury from pressurized fluid such as skin injection,  
splashing fluid, and moving parts, follow the  
Pressure Relief Procedure in your system manual  
when you stop spraying and before cleaning,  
checking, or servicing the equipment.  
1. Follow the Pressure Relief Procedure in your  
proportioner manual. Stop the pump at the  
bottom of its stroke.  
2. Remove the pump from the proportioner, as  
Figure 10 Disconnect the Lower from the Driver  
explained in your proportioner manual.  
3. Remove the TSL inlet fitting (17) and set aside.  
4. Unscrew the connecting nut (207).  
5. Move the o-ring (106) down onto the pump piston  
rod (2) to allow access to the pin (103). Remove  
the pin.  
NOTE: If you are only repairing the piston  
rod (2) and its packings, it is not necessary  
to completely remove the lower from the  
driver. After removing the pin (103), go to  
rod down out of the cylinder. Disassemble the  
piston rod as explained there.  
332339B  
9
 
       
Driver Repair  
Disassemble the Driver  
Reassemble the Driver  
1. If the guide (205) and coupling nut (204) were  
removed, apply primer and thread adhesive to  
the bottom threads of the actuator (201). Install  
the guide and coupling nut. Torque the coupling  
nut to 15–25 ft-lb (20–34 N•m). Allow 12 hours  
for the adhesive to cure.  
2. Remove the four screws (201e) and remove  
the motor (202) from the actuator (201). The  
motor-side coupler (201a) and insert (201b) will  
come off with the motor.  
2. Apply thread adhesive to the threads on the  
actuator sleeve. Insert the actuator (201) into the  
housing (203) so the tabs of the guide (205) slide  
in the groove in the housing. Screw the actuator  
into the housing.  
3. Pull the actuator (201) out the top of the housing  
(203). Do not remove the actuator-side coupler  
from the recess at the top of the actuator. The  
guide (205) and coupling nut (204) should only  
be removed if they are damaged or you are  
replacing the actuator.  
NOTICE  
To prevent possible damage to the motor, the  
motor-side coupler (201a) surface must be  
flush with the end of the motor shaft.  
3. Check that the motor-side coupler (201a) surface  
is flush with the end of the motor shaft. Torque  
the two screws (201c) to 35–45 in-lb (4–5 N•m).  
4. Ensure that the coupler insert (201b) is in  
place. Mount the motor (202) onto the actuator  
so the two couplers engage. Inspect the  
motor-to-actuator fit; the motor must rest flat on  
the actuator housing.  
NOTICE  
If the motor does not rest flat on the actuator  
housing, determine the cause and correct  
before installing the screws (201d). An  
incorrect fit will create a thrust load on the  
motor shaft, which will cause motor failure if  
operated.  
5. Install the four screws (201d).  
10  
332339B  
 
 
Figure 11 Driver Assembly  
332339B  
11  
 
 
Lower Repair  
Disassemble the Lower  
1. Remove the lower from the driver; see  
NOTE: The 70 cc lower 24T793 includes two  
u-cups (10) in the lower throat cartridge; the 35  
cc lower 24T792 includes one.  
2. Remove the top and bottom throat cartridges (4)  
to expose the piston rod (2a/2b).  
7. Unscrew the dosing valves (25) from the  
manifolds (19 and 20). Remove the seats (23)  
and o-rings (22, 24).  
3. Push the piston rod assembly down out the  
bottom of the cylinder (1).  
8. Disconnect the inlet (29) and outlet (28) tubes at  
the cylinder (1). Remove the adapters (27) and  
o-rings (33).  
4. Disassemble the piston rod (2a, 2b), using the  
flats on both ends. Remove the piston parts  
(12–16, 42) from the lower rod (2b).  
9. Remove the screws (26) holding the manifolds  
(19, 20) to the cylinder (1). Remove the o-rings  
(21).  
5. Unscrew the upper packing nut (5) from the  
upper throat cartridge (4). Remove the o-rings  
(7), packings (10), and bearing (11).  
10. Clean and inspect all parts.  
6. Remove the rod guard (8). Unscrew the lower  
packing nut (6) from the lower throat cartridge  
(4). Remove the o-rings (7), packings (10), and  
bearing (11).  
12  
332339B  
 
   
Figure 12 Lower Pump Assembly  
332339B  
13  
 
Reassemble the Lower  
5. Apply thread adhesive to the male threads of the  
lower rod (2b). Screw the upper piston rod (2a)  
onto the lower rod, using the flats on both ends.  
Torque to 35–45 ft-lb (48–61 N•m).  
1. Install the manifolds (19, 20) on the cylinder (1).  
Lubricate the o-rings (21) and ensure they are  
in place on the mating surfaces. Apply thread  
adhesive to the screws (26) and torque to 13–23  
in-lb (1.5–2.5 N•m).  
6. Insert the piston rod assembly into the cylinder  
(1) from the bottom. Push the rod up until it  
protrudes from the top of the cylinder (1).  
2. Lubricate the o-rings (33). Apply thread lubricant  
and install the adapters (27) and o-rings (33) on  
the cylinder (1). Connect the inlet (29) and outlet  
(28) tubes at the cylinder (1).  
NOTE: The 70 cc lower 24T793 includes two  
u-cup packings (10) in the lower throat cartridge;  
the 35 cc lower 24T792 includes only the upper  
one.  
3. Lubricate the o-rings (22, 24). Install the o-rings  
(22), seats (23), and o-rings (24) in the manifolds  
(19 and 20). Apply thread lubricant and screw  
the dosing valves (25) into the manifolds. Torque  
to 20–30 ft-lb (28–40 N•m).  
7. Lubricate the o-rings (7) and packing(s) (10).  
Place the upper packing (10) into the tool (T)  
included with the seal kit. The lips of the packing  
must face out of the tool. Insert the tool into the  
lower throat cartridge (4). Push on the tool’s  
shaft (P) to seat the packing securely in the  
cartridge. When seated, the lips of the packing  
will be facing up. Install the bearing (11). On 70  
cc lowers only, install the second packing (10)  
with the lips also facing up.  
4. Lubricate the piston packings (16) and o-ring  
(42). Assemble the piston on the lower rod (2b)  
as follows:  
a. Install one washer (12) and the bottom  
(shorter) spacer (13).  
b. Install one packing (16) on each shoulder of  
the piston bearing (14), with the lips facing  
away from the bearing. Install the piston  
bearing (14).  
c. Install the o-ring (42), the top (longer) spacer  
(15), and one washer (12).  
Figure 13 Piston Rod Assembly  
Figure 14 Lower Throat Assembly  
14  
332339B  
 
8. Install the o-rings (7) on the lower packing nut  
(6). Screw the packing nut into the lower throat  
cartridge (4). Torque to 20–30 ft-lb (28–40 N•m).  
12. Install the o-ring (7) on the upper packing nut  
(5). Screw the packing nut into the upper throat  
cartridge (4). Torque to 20–30 ft-lb (28–40 N•m).  
9. Slide the lower packing cartridge (4) onto the  
piston rod (2) and screw the cartridge into the  
cylinder (1). Torque to 35–45 ft-lb (48–61 N•m).  
13. Slide the upper packing cartridge (4) onto the  
piston rod (2) and screw the cartridge into the  
cylinder (1). Torque to 35–45 ft-lb (48–61 N•m).  
10. Screw the rod guard (8) securely onto the lower  
packing nut (6). Make sure the plug (9) is in place  
at the bottom of the rod guard.  
14. Install the lower on the driver; see  
11. Lubricate the o-rings (7) and packing(s) (10).  
Place one packing (10) into the tool (T) included  
with the seal kit. The lips of the packing must  
face out of the tool. Insert the tool into the upper  
throat cartridge (4). Push on the tool’s shaft (P)  
to seat the packing securely in the cartridge.  
When seated, the lips of the packing will be  
facing down. Install the bearing (11). Install the  
second packing (10) with the lips facing down.  
Figure 15 Upper Throat Assembly  
332339B  
15  
 
 
Reconnect the Lower to the Driver  
1. Ensure that the air fitting (17) is removed and  
set aside.  
2. Screw the jam nut (105) and connector (104)  
onto the pump cylinder (1), all the way to the  
bottom of the threads.  
3. Align the holes in the connector (104) with the  
ports in the throat cartridge (4).  
4. Torque the jam nut (105) to 65–75 ft-lb (88–101  
N•m).  
5. Reinstall the TSL inlet fitting (17) in the open port.  
6. Place the o-ring (106) on the piston rod (2).  
7. Align the holes in the motor shaft and piston rod.  
Install the pin (103).  
Figure 16 Reconnect the Lower to the Driver  
8. Slide the o-ring (106) up off the piston rod and  
into the groove on the motor shaft, covering the  
pin.  
9. Screw the connecting nut (207) onto the  
connector (104). Torque to 45–55 ft-lb (61–74  
N•m).  
10. Reinstall the pump on the proportioner, as  
explained in your proportioner manual.  
Figure 17 Orient the Lower to the Driver  
16  
332339B  
 
 
Parts  
Pump Assembly  
24T788, Series A, 35 cc Low Pressure Pump  
24T789, Series A, 35 cc High Pressure Pump  
24T790, Series A, 70 cc Low Pressure Pump  
24T791, Series A, 70 cc High Pressure Pump  
Ref Part  
101 24T794  
Description  
Qty  
1
DRIVER, low pressure;  
Models 24T788 and  
24T790; see Pump Driver  
24T795  
102 24T792  
24T793  
DRIVER, high pressure;  
Models 24T789 and  
24T791; see Pump Driver  
1
1
1
LOWER, pump, 35  
cc; Models 24T788 and  
24T789; see Lower Pump  
LOWER, pump, 70  
cc; Models 24T790 and  
24T791; see Lower Pump  
103 16N762  
104 16N744  
105 16N748  
106 115485  
108 16F164  
PIN, coupler  
CONNECTOR  
NUT, jam  
1
1
1
1
1
O-RING  
FITTING, sensor,  
pressure  
VALVE, check  
O-RING; chemically  
resistant  
SENSOR, fluid outlet  
pressure (24T788 and  
24T790)  
SENSOR, fluid outlet  
pressure (24T789 and  
24T791)  
ADAPTER; 1/4 npt (m x  
f); sst  
TEE; 1/4 npt (f)  
109 24T310  
110 121399  
2
1
111 24T786  
1
1
1
24T809  
112 119226  
113 104984  
114 166421  
115 187876  
1
1
1
NIPPLE; 1/4 npt  
GAUGE, pressure, fluid  
(24T788 and 24T790)  
GAUGE, pressure, fluid  
(24T789 and 24T791)  
112941  
1
332339B  
17  
 
   
Lower Pump Assembly  
24T792, Series A, 35 cc Lower  
24T793, Series A, 70 cc Lower  
A fourth u-cup (10) is used in this position on  
Model 24T793 only.  
18  
332339B  
 
 
24T792, Series A, 35 cc Lower  
24T793, Series A, 70 cc Lower  
Ref Part  
Description  
Qty  
1
Ref Part  
Description  
For Model 24T793  
PACKING, piston,  
u-cup; UHMWPE  
For Model 24T792  
Qty  
1
1
24U604  
CYLINDER, 35 cc;  
Model 24T792  
- — —  
16  
24U605  
24T842  
CYLINDER, 70 cc;  
Model 24T793  
1
1
*
2
2
2
2
KIT, piston rod  
For Model 24T793  
assembly; includes  
items 2a and 2b  
ROD, piston, upper  
17  
111328  
CONNECTOR, male;  
10–32 x 5/32 in. (4  
mm) OD tube  
— — —  
— — —  
16N750  
2a  
2b  
4
1
1
2
ROD, piston, lower  
18  
19  
104644  
24T810  
PLUG, screw; 10–32  
4
1
FITTING, throat  
cartridge  
NUT, packing, upper  
NUT, packing, lower  
O-RING; ptfe  
MANIFOLD, inlet;  
includes items 22  
and 23  
MANIFOLD, outlet;  
includes items 22  
and 23  
O-RING; ptfe  
O-RING; ptfe  
RETAINER, seat,  
valve  
O-RING; ptfe  
VALVE, dispense;  
see manual 312782  
SCREW, cap, socket  
head; 10–32 x 1.5 in.  
(38 mm)  
ADAPTER, pump  
TUBE, outlet  
TUBE, inlet  
5
6
7
8
16N751  
16T350  
* †  
1
1
5
1
20  
24T811  
1
16T352  
GUARD, rod; Model  
24T792  
21  
22  
23  
* †  
* † ◆  
2
4
4
16T351  
GUARD, rod; Model  
24T793  
1
1
9
10  
100361  
— — —  
PLUG, pipe; 1/2 npt  
PACKING, throat,  
u-cup; UHMWPE;  
For Model 24T792  
For Model 24T793  
BEARING, throat  
WASHER, piston  
SPACER, piston,  
bottom  
For Model 24T792  
For Model 24T793  
BEARING, piston  
For Model 24T792  
For Model 24T793  
SPACER, piston, top  
For Model 24T792  
24  
25  
* † ◆  
15X303  
4
4
*
3
4
2
2
26  
104472  
8
11  
12  
13  
* †  
* †  
- — —  
27  
28  
29  
31  
32  
33  
42  
2
1
1
1
1
2
1
*
1
1
- — —  
* †  
* †‡  
* †  
PLUG, pump  
O-RING; ptfe  
O-RING; ptfe  
O-RING; chemically  
resistant  
- — —  
*
- — —  
*
14  
15  
1
1
1
Items marked — — — are not available separately.  
* Included in 35 cc Lower Seal Repair Kit 24T895, which must be purchased separately.  
† Included in 70 cc Lower Seal Repair Kit 24T896, which must be purchased separately.  
◆ Included in Dosing Valve Seat Replacement Kit 24T843, which must be purchased separately.  
Included in Tube Assembly Kit 24T822, which must be purchased separately.  
332339B  
19  
 
 
Pump Driver Assembly  
24T794, Series A, Low Pressure Pump Driver  
24T795, Series A, High Pressure Pump Driver  
Ref Part  
201 16N742  
Description  
Qty  
1
Ref Part  
16N781  
Description  
Qty  
1
ACTUATOR, linear;  
for 24T794  
HOUSING, actuator;  
for 24T795  
16N777  
ACTUATOR, linear;  
for 24T795  
1
204 16N758  
16N785  
NUT, coupling; for  
24T794  
1
1
1
1
- — —  
— — —  
- — —  
201a  
201b  
201c  
201d  
COUPLER  
1
1
2
4
NUT, coupling; for  
24T795  
INSERT, coupler  
SCREW, coupler  
SCREW, motor  
mounting  
MOTOR, stepper, 23  
frame; for 24T794  
MOTOR, stepper, 34  
frame; for 24T795  
HOUSING, actuator;  
for 24T794  
205 16N764  
16N783  
GUIDE, rod; for  
24T794  
— — —  
GUIDE, rod; for  
24T795  
202 16P037  
16P036  
1
1
1
206 16N835  
207 16N745  
NUT, jam  
2
1
NUT, connecting  
203 16N743  
Items marked — — — are not available separately.  
20  
332339B  
 
 
Repair Kits, Related Manuals, and Accessories  
Description  
Kit Part No.  
24T843  
Kit Description  
All pumps in this manual.  
Dosing Valve Seat Replacement  
Kit. Includes seats and o-rings for  
all four dosing valves on a pump.  
24T302  
24T303  
TSL Cup Kit  
Throat Seal Installation Tool. Also  
included in Seal Kits 24T840 and  
24T841.  
Model 24T792 35 cc Lower  
Model 24T793 70 cc Lower  
24T840  
24T841  
Pump Seal Repair Kit. Includes  
24T303 Throat Seal Installation  
Tool.  
Pump Seal Repair Kit. Includes  
24T303 Throat Seal Installation  
Tool.  
332339B  
21  
 
 
Dimensions  
Pump Model  
A, in. (mm)  
33.0 (838)  
B, in. (mm)  
7.375 (187)  
C, in. (mm)  
8.25 (210)  
D, in. (mm)  
7.50 (191)  
E, in. (mm)  
24T788,  
24T789  
13.375 (340)  
24T790,  
24T791  
34.25 (870)  
7.375 (187)  
8.25 (210)  
7.50 (191)  
14.50 (368)  
22  
332339B  
 
 
Technical Data  
Dosing Pumps  
U.S.  
Metric  
Maximum fluid working  
pressure:  
24T788 and 24T790  
24T789 and 24T791  
Maximum working air  
pressure:  
300 psi  
1500 psi  
100 psi  
2.1 MPa, 21 bar  
10.5 MPa, 105 bar  
0.7 MPa, 7.0 bar  
Air supply:  
85–100 psi  
0.6–0.7 MPa, 6.0–7.0 bar)  
one or two component:  
Fluids handled:  
• solvent and waterborne paints  
• polyurethanes  
• epoxies  
• acid catalyzed varnishes  
• moisture sensitive isocyanates  
Viscosity range of fluid:  
Fluid inlet size:  
Fluid outlet size:  
20–5000 centipoise  
1/4 npt(m)  
1/4 npt(m)  
Air inlet size (dosing  
valves):  
5/32 in. OD tube  
4 mm OD tube  
Stepper motor  
48 Vdc, 4 amp  
The motor includes an encoder and internal controller requiring step and direction  
input integration to a PD2K controller or similar control module to operate.  
Operating temperature  
range:  
41–122°F  
5–50°C  
Weight:  
24T788 and 24T790  
24T789 and 24T791  
Sound data:  
21.2 lb  
23.5 lb  
9.6 kg  
10.7 kg  
Less than 75 dB(A)  
Wetted parts:  
17–4PH, 303, 304 SST, Tungsten carbide (with nickel binder),  
perfluoroelastomer; PTFE, PPS, UHMWPE  
332339B  
23  
 
 
Graco Standard Warranty  
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be  
free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of  
any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of  
sale, repair or replace any part of the equipment determined by Graco to be defective. This warranty applies only when  
the equipment is installed, operated and maintained in accordance with Graco’s written recommendations.  
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or  
wear caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence,  
accident, tampering, or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or  
wear caused by the incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied  
by Graco, or the improper design, manufacture, installation, operation or maintenance of structures, accessories,  
equipment or materials not supplied by Graco.  
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco  
distributor for verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge  
any defective parts. The equipment will be returned to the original purchaser transportation prepaid. If inspection of the  
equipment does not disclose any defect in material or workmanship, repairs will be made at a reasonable charge, which  
charges may include the costs of parts, labor, and transportation.  
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED,  
INCLUDING BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A  
PARTICULAR PURPOSE.  
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees  
that no other remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to  
person or property, or any other incidental or consequential loss) shall be available. Any action for breach of warranty  
must be brought within two (2) years of the date of sale.  
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND  
FITNESS FOR A PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR  
COMPONENTS SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco  
(such as electric motors, switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will  
provide purchaser with reasonable assistance in making any claim for breach of these warranties.  
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying  
equipment hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to  
a breach of contract, breach of warranty, the negligence of Graco, or otherwise.  
FOR GRACO CANADA CUSTOMERS  
The Parties acknowledge that they have required that the present document, as well as all documents, notices and  
legal proceedings entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in  
English. Les parties reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous  
documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite de ou en rapport, directement ou  
indirectement, avec les procédures concernées.  
Graco Information  
To place an order, contact your Graco Distributor or call to identify the nearest distributor.  
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505  
All written and visual data contained in this document reflects the latest product information available at the time of publication.  
Graco reserves the right to make changes at any time without notice.  
Original Instructions. This manual contains English. MM 332339  
Graco Headquarters: Minneapolis  
International Offices: Belgium, China, Japan, Korea  
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA  
Copyright 2013, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.  
Revised October 2013  
 
 

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