Model 6210 Maintenance Manual

Section 7.Component Procedures

Mast, Chain, Hose, Cable Main Mast

Adjusting Mast Guides/Dampers

The mast guides may require adjustment to reduce rattles that may occur as the truck travels over floor irregularities.

NOTE: Rattles may come from some other source, such as the forks or fork carriage.

1.If equipped with the optional keypad, press the red OFF ( O ) key. Place the Main ON/OFF Switch in the OFF position. Disconnect the battery connector from the truck.

2.Check the clearance between the inner telescopic mast and the bumper stop [1].

3.If the bumper stop [1] clearance is excessive, loosen the jam nuts [5] and readjust the set screws [6]. Make sure that you adjust the clearance equally on both sides of the mast.

Set Screws

Publication: 1146947, Revised: 12 Jan 2017 7-83

Section 7.Component Procedures

Model 6210 Maintenance Manual

Carriage Removal and Mast Disassembly

Only authorized service personnel in a suitably equipped service shop environment should perform mast replacement. Replacement of the mast assembly requires the use of a hoist or crane capable of safely lifting 10,000 lbs. (4536 kg).

The mast roller bear ings may require replacement. To repair the mast or replace bearings, you must remove the inner telescopic sufficiently to gain access to the bearings. It is recommended that only authorized service personnel in a suitably equipped service shop environment perform mast removal procedures.

Block all wheels to prevent the truck from rolling. Park the truck on a level surface and make sure all of the wheels are blocked to prevent accidental movement.

1.If equipped with the optional keypad, press the red OFF ( O ) key. Place the Main ON/OFF Switch in the OFF position. Disconnect the battery connector from the truck.

2.Attach a hoist to the top of the inner telescopic assembly.

3.Remove the forks.

4.Remove the adjustable guide screws and nuts from the inner mast crosstie.

5.Disconnect the lift chain at the fork carriage.

6.Use the hoist to raise the inner telescopic sufficiently enough to clear the fork carriage bearings.

7.The fork carriage is now detached from the mast. Repair or replace as necessary.

8.To separate the inner telescopic from the main mast, continue to lift until it clears the main mast and lift cylinder.

9.To separate the main mast from the straddle chassis, remove the lift cylinder. See “Lift Cylinder” on page7-78 .

10.Place a suitable hoist around the main mast crosstie.

11.Remove the four bolts that secure the main mast to the straddle chassis. See Figure7-88 on page7-84

Carriage Removal and Mast DisassemblyMast, Chain, Hose, Cable 7-84Publication: 1146947, Revised: 12 Jan 2017