
Maintenance
Up/Down System
5
5-24
50HD07doc072310
Maintenance
1.
Grease the up/down gear reducer shaft bearing with a NLGI No. 2 grade lithium grease
every 1000 hours of operation.
See Figure 5-14.
2.
Adjust the up/down belt as needed. Remove the up/down housing cover. To tighten the
belt, loosen the motor mount nuts. Pull the motor upward so there is 3/8" (9.5 mm) deflec-
tion with a 7 lb. (3.2 Kg) deflection force. Retighten the motor mount nuts. Replace the
drive pulley cover.
3.
The up/down motor features a spring-loaded belt design. Belt tension is automatically
maintained and requires no adjustment. Replace the belt when adequate belt tension can
no longer be obtained.
WARNING!
Always secure the saw head with a 5/16" chain
with at least 1900 lbs. working load capacity before remov-
ing the up/down motor belt. The cutting head may fall,
causing severe injury or death.
Periodically check the belt for wear. Replace any damaged or worn belts as needed.
4.
Check the up/down gearbox oil level. Add a synthetic gear oil such as Mobil SHC 634 as
needed.
Drain and refill the gearbox
with 24 ounces of oil after every 5000 hours of sawmill opera-
tion or every 2 years, whichever comes first.
FIG. 5-14
1000
3H0016B
Up/Down Gear Reducer
Shaft Bearing
AR