Maintenance
Up/Down System
5
5-17
1597doc111810
Maintenance
5.11 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.
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 carriage with a chain at the top. Find the
chain adjusting bolt at the bottom of the mast. Loosen the nut on the sprocket bolt and
move the sprocket down until there is about 1" (2.5 cm) total deflection in the center of the
chain 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.
Rev. D7.00+ Only:
A chain tension adjustment bracket/bolt is provided on the sprocket
assembly. Loosen the jam nut and tighten the adjustment bolt to pull the sprocket down
and tension the chain. Retighten the jam nut and sprocket nut after tensioning the chain.
See Figure 5-9.
FIG. 5-9
150092-1
Loosen Sprocket
Nut
Loosen Jam Nut
Tighten adjustment bolt
to tighten chain tension
NOTE:
Tension Bracket
and bolt supplied on Rev.
D7.00 and later. Previous
revisions may be upgraded
(See parts manual)