Operation and maintenance manual

Section 250-0040
SM 2157 8-02
3
4. Tap front pump housing (12) with a soft hammer if
required to separate from rear pumps (15). If front
pump housing (12) must be pried off, use care to avoid
damaging machined surfaces.
5. Separate mounting flange (1) from front cover (9) by
removing bolts (7). If it must be pried loose, use care
to prevent damage to machined surfaces.
6. Remove bolts (8) securing front cover (9) to front
pump housing (12) and carefully separate. If sections
must be pried apart, use care to prevent damage to
machined surfaces.
7. Remove front and rear seals (3 & 4) to allow
driveshaft and gear (10) and driven gear (11) to be
removed. Discard seal (2) from front cover (9).
8. Remove 'O' ring (14) and connecting shaft (13) from
rear pumps (15).
9. Separate rear pumps (15) by removing nuts at rear
of triple pump and prise apart, using care to prevent
damage to machined surfaces.
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners without special torques
specified to standard torques listed in Section
300-0080, STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
1. Replace seals in rear pumps (15) and assemble. Fit
nuts at rear and tighten.
2. Install new 'O' ring (14) and connecting shaft (13) to
rear pumps.
3. Fit new rear seals (4) to front pump housing (12).
Carefully install driveshaft and gear (10) and driven
gear (11) into front pump housing (12).
4. Fit new front seals (3) to front pump housing (12)
before fitting front cover (9) to front pump housing (12)
with bolts (8). Torque bolts to 162 Nm (119 lbf ft).
5. Fit new seal (2) to front cover (9).
6. Assemble mounting flange (1) to front cover (9)
using bolts (7). Torque bolts (7) to 46 Nm (34 lbf ft).
7. Assemble front pump housing (12) to rear pumps
(15) and secure with bolts (16). Torque bolts to 40 Nm
(29 lbf ft).
8. Install hydraulic connectors and adaptors to correct
ports and orientation.
INSTALLATION
Note: Tighten all fasteners to standard torques listed in
Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
Note: Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 230-0000, BODY
SYSTEM SCHEMATIC. Renew all 'O' rings where used.
WARNING
To prevent personal injury and property
damage, make sure blocking or lifting
equipment is of adequate capacity and properly
secured to do the job safely.
1. With suitable lifting equipment position triple pump
on transmission power takeoff. Secure with bolts (5)
and washers (6). Torque bolts (5) to 73 Nm (54 lbf ft).
2. Fill all pump ports with clean hydraulic oil and
connect lines to pump, as tagged during 'Removal.
3. Fill hydraulic tank with hydraulic oil as specified in
Section 300-0020, LUBRICATION SYSTEM. Refer to
Section 230-0040, HYDRAULIC TANK, for oil levels.
Install filler cap on hydraulic tank filler neck.
4. Place the battery master switch in the 'On' position,
start the engine and allow the machine to idle for at
least two minutes. During this break-in period, the
pump should run free and not develop excessive heat.
If the pump becomes hot to touch, it is binding and
might seize. The pump will then have to be removed
and inspected. If the pump runs properly, speed and
pressure can be increased to normal operating values.
5. Check pump mounting and hydraulic line connections
for leaks and tighten as required.
6. Remove all blocking from road wheels and place
steering bar in the 'Stowed' position.
LUBRICATION
All pump parts are lubricated by the hydraulic oil. The
oil, therefore, must be kept clean to minimize pump
wear. Whenever there is a hydraulic system failure, the
oil should be drained, the entire system flushed, filter
replaced, oil screens thoroughly cleaned and fresh
hydraulic oil installed to eliminate all metal particles or
Braking System - Triple Pump