Maintenance And Inspection Of Air Dryer; Every Three Months Or 500 Hours; Every Year Or 2000 Hours; Every Two Years Or 4000 Hours - Mitsubishi 6M60-TL Service Manual

GENERAL INSPECTION AND ADJUSTMENT

1. Maintenance and Inspection of Air Dryer

61-10
Perform maintenance and inspections at each of the indicated in-
tervals or service time.

(1) Every three months or 500 hours

• Check whether the air dryer is functioning properly by opening
the drain cock on the air tank and checking whether water flows
out.
• If a small amount of water flows out, check whether the desic-
cant has changed color. If one fifth or more of the desiccant has
changed in color from white to brown, replace the desiccant us-
ing repair kit B. (See "AIR DRYER".)
NOTE
• A small amount of moisture may collect whenever the tem-
perature in the vicinity of the air tank drops by more than
16°C.
• Place the desiccant in the case, then settle the desiccant by tap-
ping gently and evenly around the case with a plastic hammer.
• Place the soft layer side of the filter on the desiccant, and place
the filter plate on the case, then tap the desiccant down following
the manners.
• Before tapping the case against the work surface, lay two or
three layers of shop towel on the work surface to protect the
bottom of the case from scratches.
• Holding down the filter plate with both hands, lift the case to a
height of about 100 mm and tap it gently against the work sur-
face.
• Tap the case about 30 more times. Make sure the filter plate
drops by 4 to 6 mm from its original position.
WARNING
• Unless the tapping procedure is performed, particles of
desiccant may escape and create blockages in brake lines,
thus preventing normal brake operation.
• Look carefully at the water that flows out of the air dryer's ex-
haust port. If the water is contaminated with oil, inspect the air
compressor. (See "AIR COMPRESSOR".)

(2) Every year or 2000 hours

Disassemble the air dryer and replace the desiccant, oil filter, fil-
ter, and related rubber parts with the repair kit B. (See "AIR
DRYER".)

(3) Every two years or 4000 hours

Disassemble the air dryer and replace the desiccant, oil filter,
and all rubber parts with repair kit A. (See "AIR DRYER")