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Hydraulic Pump
313776G 11
Hydraulic Pump
Removal
1. Allow hydraulic system to cool before beginning ser-
vice.
2. Relieve pressure, page 7.
3. Place drip pan or rags under sprayer to catch
hydraulic oil that leaks out during repair.
4. Remove drain plug (195) and oil filter (199) and
allow hydraulic oil to drain.
5. Remove screw (224), loosen belt guard knob (241)
and belt guard (24).
6. Raise motor and remove belt (143).
7. Remove two set screws (169) and fan pulley (86).
8. Remove case drain tube (251).
9. Remove elbow (182).
10. Loosen screw (184) and remove pressure control
guard (63).
11. Loosen set screw (102) and remove remote pres-
sure control cable (12).
12. Remove eight screws (184) and washers (101), res-
ervoir cover (237), filter assembly (A) and gasket
(85).
13. Remove four screws (215) and o-rings (178), o-ring
(180) and hydraulic pump (252) from reservoir cover
(237).
Installation
1. Install hydraulic pump (252) on reservoir cover (237)
with four screws (215) and o-rings (178), o-ring
(180); torque 100 in-lb (11 N·m).
2. Install gasket (85) filter assembly (A) and reservoir
cover (237) with eight washers (101) and screws
(184); torque 90 in-lb (10 N•m).
3. Install elbow (182) per instructions, page 6; torque
to 15 ft-lb (20.3 N•m).
4. Install pressure control guard (63) and tighten screw
(184).
5. Connect hydraulic hoses (32) and (35).
6. Install case drain tube (251); torque to 15 ft-lb (20.3
N•m).
7. Install fan pulley (86) with two set screws (193).
8. Raise motor and install belt (143).
9. Install belt guard (24) with screw (224) and belt
guard knob (241).
10. Install remote pressure control cable (12).Tighten
set screw (102).
11. Install drain plug (195); torque to 110 in-lb (12.4
N•m). Install oil filter (199); tighten 3/4 turn after
gasket contacts base. Fill with Graco hydraulic oil,
page 7.
12. Start up and allow pump to operate at low pressure
for approximately 5 minutes to purge all air.
13. Check and top off hydraulic oil level.