30
MAC 6000 Hydronic Heater
Trailer Axle Manual
2106 East Indiana Ave., Bismarck, ND 58504 U.S.A. • www.macheaters.com • +1-800-272-4604
Trailer Axle Manual
SEAL INSPECTION AND REPLACEMENT
Always check the seal to make sure that it is not damaged, nicked, cracked or torn and
is in good working order. If there is any question of condition, replace the seal.
Procedure to replace seal:
1. Pull seal from the hub with a seal puller. Never push the seal out with the
bearing. The bearing may get damaged.
2. Apply a PERMATEX sealant to the outside of the new seal.
NOTE: Do not use PERMATEX on rubber encased seals.
3. Tap the new seal into place using a clean, hard wood block (Fig. 3).
NOTE: When installing a new oil seal, be sure side marked “AIR SIDE” is away from
bearing cone.
Fig. 3
BEARING ADJUSTMENT/HUB REPLACEMENT
To adjust bearings or replace removed hub, follow procedures below:
1. Place hub, bearing, washers and castle nut back on axle spindle in the reverse
order from which they were removed. Castle nut should be torqued to 50 ft.-lb.
Hub will rotate during this process.
2. Loosen castle nut to back off the torque.
3. Tighten castle nut finger tight until snug.
4. Insert cotter pin. If cotter pin does not line up with hole, back castle nut up
slightly until pin can be inserted (Fig. 4).
5. Bend cotter pin over to lock nut in place. Nut should be free to move with only
the cotter pin keeping it in place.
Fig. 4
Seal Inspection and Replacement
Bearing Adjustment and Hub Replacement
To Next Page
Loading...