Repair - Graco TexSpray 235490 Repair Manual

Displacement Pump Repair
Removal
WARNING
To reduce risk of injury due to sprayer starting
unexpectedly, shut off engine before performing
checks or service.
1. Fig. 4. Flush sprayer. Remove suction hose elbow
(150a), pump outlet hose (A) and drain hose (64).
A
27
150a
Fig. 4
WARNING
MOVING PARTS HAZARD
To reduce risk of amputating fingers,
keep fingers away from connecting rod
and pin while jogging engine.
3
1
Torque to 20 ft- -lb (27 N.m)
2 Back of pump
Cutaway view shows how pin (38) goes
3
through connecting rod
Fig. 5
10 309662
159
63
22
85
3
ti12869a
64
38
38
23
201
37
128
128
27 1
61
3
2. Fig. 5. Start engine. Jog flow control between
PRIME and OFF until connecting rod stops near
bottom of stroke. Shut off engine.
3. Loosen two quick disconnect screws (27).
4. Pry retaining spring (37) up on connecting
rod (128). Push pin (38) out with a screwdriver.
5. Fig. 6. Remove cover (C) to control housing (54)
by removing four screws (12). Detach pressure
transducer cord (63, Fig. 4) from control board (9)
at port (D). Remove pressure transducer cord from
control box.
158
6. Fig. 4. Remove air hoses (158) and (159) from
prime valve manifold (85). Note correct air hose
connection to ports on air cylinder (22). Use 5/16
inch wrench to hold ring on hose fitting while
removing hose from fitting.
7. Support weight of pump (3) and remove two quick
disconnect screws (27).
8. Unscrew assembled dump valve manifold (85) and
air cylinder (22) from pump (3).
2
Fig. 6

Repair

0407
See page 12 for pump repair instructions.
9
C
12
D
ti3007b
54