Lull 944E-42 Service Manual - Manual (Page 425)

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.