Operation and maintenance manual

Body System - Main Hydraulic Pump
Section 230-0050
SM 1394 Rev1 12-04
4
Note: Ensure bearings (7) are pressed to insertion
depth indicated in Fig. 4.
2. Install new lip seals (20) and location sleeve (19) to
front cover (2), as shown in Fig. 1.
3. Apply a thin film of grease on new wear plate seal
(8) and backup seal (9) and install in wear plate (14),
as shown in Fig. 5.
4. Install wear plate (14) into body housing (1) bore,
with wear plate seal (8) facing down.
Note: The relief groove in wear plate (14) should face
the outlet side of the pump.
5. Lightly oil gear faces, gear flanks and journals with
mineral oil prior to assembly.
6. Slide driven gear (12) and drive shaft (11) into its
bearing in body housing (1).
Note: When installing the original gear sets, align as
match marked at disassembly.
7. Apply a thin film of grease on second wear plate
seal (8) and backup seal (9) and install in second wear
plate (13), as shown in Fig. 5.
8. Install wear plate (13) assembly on gear shaft end
(11) and body housing (1) bore, with wear plate seal
(8), and backup seal (9) facing up.
Note: The relief groove in wear plate (13) should face
the outlet side of the pump.
9. Fit ring seal (10) to body housing (1) machined face.
Ring seal (10) to be fitted dry.
10. Coat special sleeve tool, which can be fabricated
as shown in Fig. 8, with grease and install driveshaft
and gear (11) in the sleeve tool, as shown in Fig. 6.
11. Position assembled front cover (2) over gear shaft
ends (11 & 12). Tap front cover (2) with a soft hammer
until it rests against wear plate (14) in body housing
(1), as shown in Fig. 7. Take care not to damage ring
seal (10) and seal (20).
Note: Make sure index marks on front cover (2) and body
housing (1) match up, as marked at disassembly.
12. Remove sleeve tool from drive of driveshaft and gear
(11) and cover the gear set with hydraulic oil specified in
Section 300-0020, LUBRICATION SYSTEM.
13. Secure body housing (1) and front cover (2)
together with four capscrews (15). Tighten capscrews
(15) alternately to ensure correct alignment of parts.
Rotate driveshaft (11) to check for internal binding of
parts. If no binding is evident, tighten capscrews (15)
alternately to a torque of
772 Nm (569 lbf ft).
14. Apply a continuous beading (1 - 1.5 mm dia.) of
sealant to flange mounting (3) face, approximately
10 mm from locating sleeve (19) before installing
mounting flange (3). Tap mounting flange (3) with soft
hammer until it rests against front cover (2).
15. Secure mounting flange (3) to front cover (2)
together with three capscrews (16). Tighten
capscrews (16) alternately to ensure correct alignment
of parts. Rotate driveshaft (11) to check for internal
binding of parts. If no binding is evident, tighten
capscrews (16) alternately to a torque of
162 Nm (119 lbf ft).
Fig. 4 - Bearing Insertion Depth
SM - 1866
SM - 1867
Fig. 5 - Wearplate Seal Fitting
BEARING
(ITEM 7)
BODY HOUSING
(ITEM 1)
1.50/1.75 mm
OUTLET INLET
Z
Z
WEARPLATE
SEAL
(ITEM 8)
WEARPLATE
SEAL
(ITEM 8)
WEARPLATE
SEAL
(ITEM 8)
BACKUP
SEAL
(ITEM 9)
BACKUP
SEAL
(ITEM 9)
BACKUP
SEAL
(ITEM 9)
45˚ CHAMFER
WEARPLATE
(ITEMS 13 & 14)
ALTERNATIVE CUT
SEAL AND BACKUP SEAL
SECTION Z - Z