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PAGE 52 — MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04)
ST-45 PUMP — MAINTENANCE (PUMP)
WHEEL BEARINGS
After every 6 months of operation inspect the wheel bearings.
Once a year, or when required, disassemble the wheel hubs
remove the old grease and repack the bearings forcing grease
between rollers, cone and cage with a good grade of high speed
wheel bearing greases (never use grease heavier than 265
A.S.T.M. penetration “No. 2.”).
1. Fill the wheel hub with grease to the inside diameter of the
outer races and also fill the hub grease cap.
2. Reassemble the hub and mount the wheel. Then tighten the
adjusting nut, at the same time turn the wheel in both
directions, until there is a slight bind to be sure all the bearing
surfaces are in contact.
3. Back off the adjusting nut 1/6
to 1/4 turn or to the nearest
locking hole or sufficiently to allow the wheel to rotate freely
within limits of .001” to .010” end play. Lock the nut at this
position.
4. Install the cotter pin and dust cap, and tighten all hardware.
EXTENDED STORAGE INSTRUCTIONS
The following preventative maintenance is recommended for
extended periods of storage.
1. Check brake system for proper fluid level in master cylinder
and bleed all lines.
2. Lubricate all links and pivots to prevent any rusting.
3. Remove wheel and drum assemblies and spray a good anti-
corrosion compound (CRC formula 5-56) under rubber boot
on forward end of brake wheel cylinder. Avoid spraying drum
and brake lining.
4. Grease all bearings and reinstall wheel and drum
assemblies.
5. Make sure breakaway cable is fully released.
6. After extended storage, refer to the Maintenance Steps listed
above to insure that the trailer is ready for towing.