SECTION 7
TRANSMISSION
hydraulic system should be disassembled and cleaned.
of oil (C350B only). Reassemble the brake (refer to
Section 10) (see figure 7-100).
7-209. Removal and disassembly of the following list of
components is required when any system component
m. Fill final drive with lubricant (refer to Section 4).
fails. Inspect each component for damage and rebuild or
n. Install the hydrostatic pump and motor.
replace as required.
o. Replenish transmission lubricant supply (refer to
a. Steering pump.
b. Steering cylinder.
p. Follow transmission start-up procedure before
c. Steering control unit.
returning unit to service.
NOTE: Matching of mating parts is critical.
7-204. INSTALLATION OF HYDROSTATIC
d. Cooler by-pass valve.
MOTOR.
e. Hydraulic tank.
7-205. Install the hydrostatic motor by reversing the
f. Transmission displacement control valve.
procedure presented in paragraph 179. Note the
following:
g. Transmission servo cylinders.
h. All hoses.
a. The motor mounting surface should be coated with
a plastic sealer.
NOTE: Replace the oil filter with a Hyster approved 10
micron filter only. It is recommended after
b. Torque the motor mounting bolts to 75 ft.-lbs. (10.4
overhaul that the oil filter be replaced at 50
kg-m).
hours after start- up before returning to normal
maintenance cycle.
c. Torque the high-pressure lines to 35 ft.-lbs. (4.8 kg-
m). Connect by-pass valve linkage.
7-210. Refill the hydraulic
system
with
oil
per
specifications (see Section 2).
d. After installation the transmission start-up
procedure must be completed before returning the unit
7-211. Precharge the hydraulic system as follows:
to service.
a. Disconnect the case drain hose at the pump.
7-206. HYDROSTATIC PUMP INSTALLATION.
b. Fill pump and motor cases with specified oil (see
7-207. Install the hydrostatic pump by reversing the
procedures presented in paragraph 7-178. Take note of
the following:
c. Loosen the end of the suction hose at the charge
pump. If hydraulic oil is not present, pressurize the tank
a. Torque pump mounting capscrews to 75 ft.-lbs.
to a maximum of 10 PSI (0.7 kglcm2).
(10.4 kg-m).
d. Retighten hose fittings when oil appears.
b. Torque high-pressure line capscrews to 35 ft.-lbs.
(4.8 kg-m).
e. Complete the transmission start-up procedure.
CAUTION:
Follow transmission start-up procedure
NOTE: Partial cleaning of the system is ineffective.
before returning unit to service.
Any contamination left in the system may cause
a repeat failure.
7-208. CLEANING THE HYDRAULIC SYSTEM.
CAUTION: The importance of cleaning the entire
hydraulic system after any component
failure cannot be over- emphasized. If a
failure occurs in either the hydrostatic drive
system or the steering circuit, the entire
7-51.
