Section 3 - Service & Repair Elevating Assembly
Page 3-23
R
EMOVAL
OF
E
LEVATING
A
SSEMBLY
Refer to Figure 3-16: “Elevating Assembly,” on page Section 3-20.
2. Disconnect the batteries using the battery disconnect in front of the batteries in the battery tray.
3. Remove the platform mast cover, and the controller cover plate.
4. Detach the control cable inside the controller, remove the cable clamp in the top of the platform
mast (4), and feed the cable into the second inner mast section (2).
5. Disconnect the outer sequence rope from the outer chain anchor.
6. Disconnect the outer chain anchor from the platform mast, but leave the anchor attached to the chains.
7. Remove the lower mast bearings from the platform mast.
8. Raise the platform mast straight up and off of the remaining mast sections. using a suitable hoisting
9. Lay the chain that was detached from the platform mast over the top of the upper cylinder mount (7),
and place it down inside the second inner mast section.
10
. Repeat steps 4 - 7 on the seco
nd inner mast section (3) and inner sequence rope. The lower
mast bearings are removed by unscrewing the two screws on each bearing. Note, you will also have to
remove the sequence rope pulley wheel assembly.
11. The upper chain set may now be removed by detaching the upper chain/inner pulley mounts from the
first inner mast section (1). Carefully set the chain set aside on a clean surface.
12. Remove the single bolt that attaches the cylinder to the upper cylinder mount (7).
13. Using a suitable hoisting device, carefully raise the first inner mast section (1) up several inches.
14. Lay the remaining chain set over the top of the cylinder, and place it down inside the inner mast section.
15. Remove the lower mast bearings from the
wheel assembly.
first inner mast section and remove the sequence rope pulley
16. Raise the first inner mast section straight up and off of the remaining base mast section.
17. The inner chain set may now be removed.
18. If it is necessary to remo
ve the base mast section, remove the nine bolts that secure it to the chassis. It
may be required to remove the lift cylinder to provide easier access to the bolts (see “Lift Cylinder” on
page Section 3-18).
I
NSTALLATION
OF
E
LEVATING
A
SSEMBLY
Refer to Figure 3-16: “Elevating Assembly,” on page Section 3-20.
Installation of the elevating assembly is the reverse of removal.
Torque the nine bolts that retain the base mast section to 68N-m (50 ft-lbs).
For all of the cap screws that attach the chain anchors to the mast sections, apply Loctite 242 to the
screw threads and torque to 12N-m (107 in-lbs).
For all of the screws that attach the mast bearings, apply Loctite Retainer #405 to the screw threads.
Do not torque, simply tighten securely.
Check elevating assembly for proper operation.
1. Elevate the platform and support the elevating assembly, see section 3.1.
device.
Adjust the chain and sequence rope tensions as described in this section, ensure that the chain
tensioner locknuts are correctly tightened and the tensioner bolt threads are visible through the inspection
holes in the tensioner blocks.
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