Model 4700 Maintenance Manual

Section 7.Component Procedures

to the lower end of the outer intermediate upright.

• Roller Shimming - Install shims to provide a total side-to-side clearance of 0.06 in. (1.5 mm) max. at the tightest point throughout the travel of the upright. See Figure7-100. Pry between the upright and the load roller so that the opposite load ro ller is tight against the upright. Measure the clearance for the pair of rollers at the XXX shown in Figure7-100 . Use an equal number of shims on each side.

NOTE : Roll the uprights past installed thrust plugs/blocks before checking load roller clearance.

• Thrust Plug/Block Replacement - Install thrust plugs/blocks to provide a clearance of 0.06 in. (1.5 mm) max. between an upright and its corresponding thrust plug/block. See Figure7-101. Pry between the upright upper cross members. Measure the clearance at the XXX shown to determine which thickness thrust plug/block to use. Thrust plugs/blocks may be shimmed as required.

4.Lubricate the full length of the outer intermediate upright rails. See “Lubrication Specification Chart” on pageA-2 and Figure7-100

5.Attach an overhead hoist to the inner intermediate upright and install it through the top end of the outer intermediate upright. Position it out the lower end of the outer intermediate upright approx. 6 in. (15cm).

6.Install shims and load rollers to the lower end of the inner intermediate upright. Install shims, load rollers, and thrust plugs to the upper end of the outer intermediate upright. Refer to step 3 for roller shimming and thrust plug clearance measurement.

7.Install the chain sheaves to the upper end of the outer intermediate upright. Install the outer main lift chain anchors and chains over the outer intermediate upright chain sheaves.

Mast Quad Mast Service Publication

Section 7.Component Procedures

8.Install the outer main lift chain anchors (long anchors) to the lower end of the inner intermediate upright.

9.Install the lower stop on the outer intermediate upright. Torque the cap screw to 81 to 88 ft. lb. (110 to 120 Nm).

10.Install the main chain sheaves, free lift sheaves, and hose in the inner intermediate upright. Torque the retainer cap screws to 26 to 30 ft. lb. (35 to 40 Nm).

11.Install the upper inner main chain anchors to the outer in termediate upright. Install the free lift hose bracket and tube.

12.Lubricate the inner intermediate upright rails. See “Lubrication Specification Chart” on pageA-2.

13.Attach an overhead hoist to the inner upright and install through the top of the inner intermediate upright. Position it out the lower end of the inner intermediate upright approx. 6 in. (25 cm).

14.Assemble shims and load roller to the lower end of the inner upright. Assemble shims, load rollers, and thrust plugs to the

Model 4700 Maintenance Manual

upper end of the inner intermediate upright. Refer to step 3 for roller shimming and thrust plug clearance measurement.

15.Install the inner main lift chain anchors (long anchors) on the back side, lower end of the inner upright. Connect the inner main lift chains.

16.Install the stop/hose bracket/tube assembly on the lower end of the inner upright. Torque the cap screws to 81 to 88ft.lb. (110 to 120 Nm).

Publication 1160093, Issued: 20 May 2013