844/642 TelehandlerSINGLE CHAIN REPLACEMENT

STEP 7

STEP 10

Pull the clevis block forward slightly and tie a long rope to the clevis block to aid in single chain installation.

STEP 8

Use a crowfoot wrench with a long extension to reach in and loosen the locking nut on the clevis. Once the locking nut is loosened, push the clevis forward and remove both nuts from the clevis.

STEP 9

Remove the single chain by pulling out from the rear of the boom. Remove the rope from the single chain clevis, and leave the rope in place for single chain installation.

NOTE: Check the condition of the sheave and roller bearing at this time. Proceed to Step 26 if repair is required.

Remove the adjustment clevis from the old chain by removing one cotter pin and the retainer pin.

Step 11

Remove the clevis block from the old chain by removing one cotter pin and the retainer pin.

Installation

STEP 12

Install the clevis block on the new chain using the retainer pin and cotter pin.

Template Name: OML_2_col

STEP 13

STEP 16

Install the adjustment clevis on the new chain using the retainer pin and cotter pin.

STEP 14

Attach the rope to the clevis block on the new chain. Have an assistant (at the front of the boom) pull the chain in place with the rope while you guide the chain into position.

STEP 15

Position the single chain over the bearing and insert the clevis end into the mounting hole at the rear of the inner boom section. Install the first nut onto the single chain clevis so that 2-3/4 inch (70 mm) of the clevis is extending from the mounting bracket on the inner boom.

Pull back on the single chain clevis to position the nut between the two bars on the bracket. Check the amount of clevis extending from the bracket, then adjust to achieve dimension shown.

STEP 17

Install the clevis block (1) to the outer boom using the three bolts and washers (2). Use Loctite  271 (red) Thread Lock (or equivalent) on the threads of the bolts.

STEP 18

Pull the inner boom out of the intermediate boom as far as the single chain will allow to remove any chain slack.

Template Name: OML_2_col

Template Date: 1994_04_22