Lull 6K Service Manual - Manual (Page 532)

Frame Tilt and Oscillation
7-30 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Assembly, Rear Oscillation Lock Cylinder
1. Lubricate new O-ring with hydraulic oil and install inside piston (seals
the rod to the piston).
2. Lubricate new O-ring, backup ring, seals, and wear rings with hydraulic
oil and install on head (Item 8). Using a seal driver, install new wiper
seal in head. Lubricate wiper seal with hydraulic oil.
3. (Ref. Fig. 7-18) Slide head (Item 8), stroke limiter (Item 5) and piston
(Item 4) onto rod (Item 6). Lubricate threads on rod with hydraulic oil
and install rod nut (Item 3). Torque rod nut to 950 ft-lbs.
4. Lubricate new seal and wear rings with hydraulic oil and install on
piston.
5. Lubricate threads on capscrews (Item 7) with hydraulic oil. Coat inside
of barrel (Item 2) with hydraulic oil. Carefully insert rod and head into
barrel. Do not damage seals during assembly. Install and snug
capscrews (Item 7). Do not torque capscrews (instructions follow).
Fig. 7-19: Head Capscrew Torque Sequence
6. Following sequence shown in Fig. 7-19, torque head capscrews to an
initial value of 30 ft-lbs. Follow sequence again and torque capscrews
to a final value of 65 ft-lbs.
7. Install oscillation control block. See page 7-35.
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