Lull 6K Service Manual - Manual (Page 233)

Supply, Pressure, and Return Hydraulics
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 5-89
(Ref. Fig. 5-56) The following procedure describes removal of the rear axle
stabilizer control valve.
1. Follow preparation procedures as outlined in Section 3 of this manual.
Be sure to follow the guidelines in this section detailed under “General
Hydraulic Maintenance Practices” on page 5-4.
2. Install brake pressure diagnostic port test gauge into brake diagnostic
port (see page 5-90).
3. While watching test gauge, press brake pedal numerous times until
pressure gauge reads 0 psi. Remove test gauge from diagnostic port.
4. Thoroughly clean the rear axle stabilizer control valve.
5. Disconnect intermediate wiring harness (Item 22) from the low brake
pressure switch (Item 24) and solenoid valve (Item 23).
6. If working on models with outriggers, disconnect the boom extend wire
harness (Item 6) from the connector on solenoid valve located on the
boom extend lockout valve (Item 1).
7. Except for item 19, tag and slowly loosen all hydraulic hoses (Items 2,
5, 7 through 18, and 25). Disconnect hoses and bleed any remaining
oil into appropriate container. Cap fittings and hoses.
Note: Models with outriggers have a total of sixteen (16) hoses; all other models
have fifteen (15) hoses.
8. Remove the three (3) each capscrews (Item 20) and lockwashers
(Item 21) securing the rear axle stabilizer control valve (Item 26) to the
valve plate.
9. Remove the rear axle stabilizer control valve from the machine and
take it to a clean area appropriate for further disassembly, cleaning,
and overhauling.