EN
Remove the head cover and cylinder caps to inspect the thrust washers, spacers, needle
bearing, crank pin, crank shaft, rod assemblies piston seals. When components upto and
including the lower thrust washer have been removed, gently turn the crank shaft by hand
to be sure it moves freely. If bearings are seized or have signs of axial play, remove snap
ring and press out and inspect crankshaft and bearings.
Replace components where appropriate with a overhaul kit, reassemble in reverse order
grease top bearing (502735), apply a fresh layer of grease to rod assemblies and piston
seals (AGMD-010). Ensure the motor turns freely before operation of motor.
12 - 24 Months
Recommended installation of repairs kits when operation at a constant speed:
6 - 12 Months
Daily
Inspect air motor for correct operation
+ 300 RPM
To prolong the life of the motor we do not recommend running in excess of 300 RPM
Typical period
Recommended operation
Motor Speed
Piston Seal kit:
31-550-K, 31-553-K, 31-556-
K, 31-559-K
Motor repair kit:
31-551-K, 31-554-K, 31-557-
K, 31-560-K
Motor overhaul kit:
31-552-K, 31-555-K, 31-558-
K, 31-561-K
24 - 36 months
12 -24 months
*36
*24
0-150 RPM
12 months
6 - 12 months
150-300 RPM
Remove the head cover and cylinder caps to inspect the thrust washers, spacers, needle
bearing, crank pin, piston seals. Note: Piston seal installation tools are available to aid
installation see accessories page 17.
Replace components where appropriate using motor repair kit, apply a fresh layer of
grease to rod assemblies and piston seals (AGMD-010). Ensure the motor turns freely
before operation of motor.
Maintenance schedule
4 - 6 Monthly
Remove the vent to expose the grease nipple and add two shots of grease (502735) into
the crank pin, while slowly rotating the crankshaft.
* Depending on air quality and service schedule (Conduct inspection and overhaul if appropriate)
77-3356 R1.0 (10/22)
14/20
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