Doosan Forklift D20S-9

NOTE! Make sure that carriage height is correct.

If correct, adjust the chain for equal tension. If not, adjust the chain for correct carriage height by adjusting anchor nuts.

NOTE! See the previous section, “Carriage Roller Extrusion” in “When Required” for proper height of carriage.

Fully lower the carriage and tilt mast forward or lift the carriage and put blocks under the carriage to release the tension from the lift chains.

Did you fully lower the carriage and tilt mast forward or lift the carriage and put blocks under the carriage to release the tension from the lift chains?

Loosen nut and adjust nut to get proper distance from bottom of inner upright to the bottom of carriage bearing.

Did you loosen nut and adjust nut to get proper distance from bottom of inner upright to the bottom of carriage bearing?

Make adjustment anchor nut for equal chain tension.

WARNING! Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin

NOTE! Park the lift truck level with the forks lowered, parking brake engaged, transmission in NEUTRAL and the engine stopped

Loosen the bolts of the hydraulic tank top plate assembly

Remove the return filter from tank top plate assembly

Install new return filter by hand

Remove the suction strainer from the tank

Install the new strainer by hand

Install the tank top plate assembly and fasten the bolts

Remove and discard the air breather

WARNING! Personal injury can be caused by sudden movement of the mast and carriage. Keep hands and feet clear of any parts that can move.

Lift the carriage and the mast high enough for getting tension on lift chains

Check the chains, and make sure the tension is the same

Lift chains are required to check for equal tension about every 1,000 service hours or 6 months

Sign off on the lift chain tension check

Warning: This procedure requires trained personnel with PPE!

Inspect the part of the chain that is normally operated over the cross head roller

Inspect to be sure that chain link pins do not extend outside of the link hole

If any single link pin is extended beyond its connecting corresponding link, it should be suspected of being broken inside of its link hole

Lift chains are required to check for wear about every 1,000 service hours or 6 months

Chain wear test is a measurement of wear of the chain links and pins

Take the following steps to check chain wear

Lift the mast and carriage enough for getting tension on lift chains

Measure precisely ten links of chain distance at the center of pins in millimeter

NOTE! Make sure that mast height is correct. If correct, adjust chain for equal tension. If not, adjust mast chain for correct mast height by adjusting anchor nuts

NOTE! See the previous section, “Carriage Roller Extrusion” in “When Required” for proper inner mast height

Lift the inner mast and put blocks under the inner mast to release the tension from the lift chains

Loosen nut and adjust nut to make inner mast rail flush with outer mast rail bottom

Make adjustment anchor nuts for equal chain tension

Raise the inner mast and check equal chain tension. If not equal, repeat the same procedure as step 1 through step 3

Put LOCTITE No. 242 tread lock on the threads of the anchor nuts after the adjustment is completed

Sign off on the mast chain adjustment