Maintenance
Up/Down System
5
5-23
60HD-R04doc112210
Maintenance
5.14 Up/Down System
WARNING!
Before performing service near moving parts
such as blades, pulleys, motors, belts and chains, first turn
the key switch to the OFF (#0) position and remove the key.
If the key is turned on and moving parts activated, serious
injury may result.
WARNING!
Disconnect and lockout power before perform-
ing any service to the electrical system. For battery-pow-
ered equipment, disconnect the negative battery terminal
cable. For AC-powered equipment, follow the lockout pro-
cedure provided in the safety section (
Failure to do so may result in injury and/or electrical system
damage.
Adjust the up/down chain tension as needed. Measure chain tension with the head all the
way to the top of the vertical mast. Secure the head with a chain at the top. Find the chain
adjusting bolt at the bottom of the mast. Use the adjustment nut to adjust the bolt until the
center of the chain can be deflected 3/4” (1.9cm) forward with a 5 lb. (2.3 Kg) deflection
force.
WARNING!
Always secure the saw head with a 5/16" chain
with at least 1900 lbs. working load capacity before adjust-
ing the up/down chain. The cutting head may fall, causing
severe injury or death.
CAUTION!
Do not over-tension the chain. Over-tensioning
the chain may lead to early failure of the gear reducer.
See Figure 5-13.
AR