HYDRAULIC LIFT CHAIN.

(2) Install all performed packings and backup

(5) Fork to floor clearance will range from 0 to 3/4

rings.

inch, depending on tire wear and machine tolerances.

(3) Assemble aligning pins and bearings. Put

(6) Raise the inner rail assembly to its fullest

them onto pump gearshafts and install assembly in

height and check the clearance between the inner rail

pump housing.

stops and the outer rail stop blocks. If the stop blocks

are touching, readjust the nuts until a clearance of at

(4) Install mounting flange cover on pump

least 1/8 inch is obtained.

housing, and retain it with screws. Install seal and

retaining ring in cover.

(7) Adjust nuts until deflection is equal with the

same tension applied to each chain at the same height.

(5) Assemble pump drive assembly in the

Keep nut and jam nut as close to end of screws as

reverse order of disassembly.

possible and still obtain above adjustments. This will

allow lowest possible position of forks. Tighten jam nuts.

e. Installation. Reverse the procedure in a. above.

Fill hydraulic tank in accordance with the Lubrication

6-31. HYDRAULIC OIL TANK.

Chart.

a. Removal.

6-30. HYDRAULIC LIFT CHAIN.

(1) Raise truck to permit removal of hydraulic oil

a. Removal.

tank from beneath truck.

(1) With carriage and fork assembly completely

(2) With truck lift lowered and tilted back, remove

bottomed, release chains at hydraulic lift cylinder by

drain plug and drain oil into a container.

removing two adjusting screws and four nuts.

(3) Disconnect all tubing at tank and filter flange.

(2) Lift off load backrest, and reach behind

carriage unhook chains at lift carriage. Pull chains free

(4) Remove four nuts, flat and lock washers, and

of unit.

screws, securing tank to chassis.

b. Cleaning. After removal clean chain by soaking

b. Cleaning.

in SD, at the same time scrubbing with a wire brush to

remove encrusted lubricant. Dry with clean dry cloths, or

(1) Remove four screws and washers which fasten

dry compressed air. Lubricate by soaking in OE 10.

filter mounting flange to tank. Lift off flange and gasket.

c. Inspection. Inspect chain for worn or damaged

(2) Lift out filter element and tube.

side plates or link pins, damage from lack of lubrication

or rust.

(3) Wash all parts removed from tank in SD, and

dry with dry compressed air.

d. Installation.

(4) Flush interior of tank with SD, and drain dry.

(1) Feed chains over rollers of crosshead

Be sure no SD is left in tank after cleaning.

assembly and hook in position on carriage assembly.

(5) Steam clean exterior of tank, dry thoroughly

(2) Install adjusting screws through holes

and install items removed in steps (1) and (2) above.

provided on lift cylinder and install four nuts on adjusting

screws.

c. Installation. Reverse a above.

e. Adjustment.

6-32. HYDRAULIC FLOW CONTROL VALVE.

(1) With no load on forks move forks to their

a. Removal.

extreme width.

(1) Disconnect hoses and tubing at control valve,

(2) Lower forks completely.

remove fittings from valve, and cap or plug open

hydraulic lines to exclude dirt.

(3) Move upright to vertical position.

(2) Remove screw, nut and washers securing

(4) Turn the nuts up on the adjusting screws as

valve to chassis.

far as threads will allow.