Lull 944E-42 Service Manual User Manual download pdf (Page 425)

100

101

8.173

Model 644E-42/944E-42 Rev. 6/04

Hydraulic System

30. Apply a light coating of graphite grease to the new

square cross section o-ring (10) and carefully install

into the groove in the mounting flange housing (11).

Be careful that the o-ring does not twist in the

groove. The o-ring must be flat in the groove for

proper sealing of the pump when assembled.

31. Coat both the new seal gland (12) and new plastic

seal retainer (13) with graphite grease. Carefully

install the seal gland in the groove in the seal

retainer, make sure the seal gland is seated

completely in the seal retainer.

32. Coat the seal cavity area in the mounting flange

housing (11) with graphite grease to hold the new

seals in place during assembly.

33. Install the assembled seal gland and seal retainer in

the cavity in the mounting flange housing (11). Be

sure the plastic seal retainer (13) is facing away from

the mounting flange housing. Very carefully press

this assembly in place until it is firmly seated in the

machined recess. This assembly must be seated

completely in the recess to allow proper installation

of the bronze wear plate (14).

34. Lubricate the steel side of the bronze wear plate (14)

with graphite grease and install over the seal retainer

and seal gland assembly. When properly installed

the bronze face will be next to the gears and flush

with the surface of the mounting flange housing.

Lightly oil the bronze side of the wear plate with

clean hydraulic oil.

35. Install the mounting flange housing (11) onto the

studs (7). Be careful not to damage the seals inside

the mounting flange housing with the splined end of

the drive gear (8). Make sure all the seals and wear

plates have stayed in their proper position. It may be

necessary to use a plastic mallet to seat the

mounting flange housing onto the center section.

36. Install the eight lockwashers (15) and hex nuts (16)

onto the threaded studs. Torque the hex nuts to

65-75 lb-ft (88-101 Nm).

37. Install the new weep hole plug (17) in the side of the

mounting flange. Push the weep hole plug all the

way in.

38. Place a small amount of clean hydraulic oil in the

inlet of the pump and rotate the drive shaft one

revolution. No binding should be evident.

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Lull 944E-42 Service Manual User Manual Page 425

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