Lull 6K Service Manual User Manual
Page 184
Supply, Pressure, and Return Hydraulics
5-40
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
4. Clean exposed areas of hydraulic pump with appropriate solvent and
dry with compressed air.
5. (Ref. Fig. 5-26) Lubricate and install new O-rings on pump.
6. Lubricate threaded portion of each fitting, including the O-ring.
Steps 7 thru 14 apply to Fig. 5-25. Refer to notes made earlier for correct
positioning of all fittings.
7. Install connector (Item 13) in lower port on front of pump. Torque the
connector to 25–29 ft-lbs.
8. Install check valve (Item 15) in side port of pump. Torque the valve to
46–50 ft-lbs.
9. Install branch tee (Item 8) on side port of pump. Torque the tee to
40–44 ft-lbs.
10. Install reducer adapter (Item 6) on the branch tee (Item 8). Torque the
adapter to 44–48 ft-lbs.
11. Install connector (Item 16) on top of pump. Torque connector to
205–235 in-lbs.
12. Install swivel run tee (Item 19) on connector (Item 16). Torque nut on
tee to 130–150 in-lbs.
13. Install long elbow (Item 20) on top of pump. Torque elbow to
40–44 ft-lbs.
14. Install pressure switch (Item 9).
15. (Ref. Fig. 5-26) Install two (2) elbows (Item 2) on side of pump. Torque
elbows to 75–85 ft-lbs.
Installation
Hydraulic Pump
Models with Control Manifold Hydraulics
6K-37 (S/N 101–317)
6K-42 (S/N 101–119)
8K-42 (S/N 101–220)
10K-42 (S/N 101–106)
10K-54 (S/N 101–103)
644B-37 (S/N 101–590, 592–666)
644B-42 (S/N 101–207)
844C-42 (S/N 101–621)
1044C-42 (S/N 101–116)
1044C-54 (S/N 101–154)
(Ref. Fig. 5-24) The following procedure is for the installation of the
hydraulic pump for models with control manifold hydraulics.
1. Insert assembled hydraulic pump straight into the transmission making
sure the pump is supported so it cannot twist and cause damage.
Install the pump on the transmission with the two (2) capscrews
(Item 7) and lockwashers (Item 8). For final tightening, torque the
capscrews to 55 ft-lbs.
2. Untie flange head connector (Item 1). Clean open end of flange head
connector and opening on transmission (Item 11) with appropriate
solvent. Dry with compressed air.
3. Connect the flange head connector to the hydraulic pump with the two
(2) flange halves (Item 4), four (4) capscrews (Item 2), and four (4)
lockwashers (Item 3). For final tightening, torque the capscrews to
55 ft-lbs.