User's Manual

Hydraulic Motor Yoke
20 311021U
Hydraulic Motor Yoke
Removal
1 Relieve pressure; page 7.
2 Place drip pan or rags under sprayer to catch
hydraulic oil that leaks out during repair.
3 Remove pump; page 16.
4 Fig. 7. Remove hydraulic lines (35, 250) from fittings
(217) at top left and right side of hydraulic motor.
5 Loosen jam nut (183).
6 Unscrew and remove hydraulic motor cap (25).
7 Slide piston rod/hydraulic motor cap assembly (A)
from hydraulic motor cylinder.
Installation
FLYING PARTS HAZARD
1 Slide piston rod assembly (A) into hydraulic motor
cylinder (69).
2 Screw down hydraulic motor cap (25) until cap
bottoms out. Unscrew hydraulic motor cap until inlet
and outlet align with hydraulic line fittings and test
hole in hydraulic motor cap points opposite of belt
guard (24).
3 Torque jam nut (183) against hydraulic motor cap
(25) to 150 ft-lb (17 N·m).
4 Install hydraulic lines (35, 250) to fittings (217) to top
left and right side of hydraulic motor per procedure
on page 6; torque to 40 ft-lb (54.2 N·m).
5 Install pump, page 24.
6 Start engine and operate pump for 30 seconds.
Turn engine OFF. Check hydraulic oil level and fill
with Graco hydraulic oil, page 7.
FLYING PARTS HAZARD
Detent spring has high energy potential. If detent
spring is released without due care detent spring and
balls could fly into the eyes of the disassembler. Wear
safety glasses when removing or installing detent
spring and balls. Failure to wear safety glasses when
removing detent spring could result in eye injury or
blindness.