Blount 853PRO User Manual
Page 12
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904
TITLE
853PRO OPERATOR’S MANUAL
13
MAINTENANCE
DRIVE SPROCKET REMOVAL
• STEP 1 – Prevent the sprocket from rotating by inserting the
scrench or screwdriver through the holes in the sprocket and
the hole in the saw body.
• STEP 2 – Loosen the Trantorque
®
using a 7/8 in box end
wrench.
NOTE: Slurry will accumulate inside the Trantorque
®
adaptor while cutting. This can fill expansion spaces
and make it difficult to remove. To faciliate removal,
turn the hex nut counterclockwise approximately 1/8
turn, and then turn it clockwise slightly, so the hexnut
is loose. Then lightly tap the end of the ring inside the
hex nut several times with your box wrench. (This will
loosen the slurry and allow the components to slide for
removal). Continue to turn the hex nut counterclockwise
to free the sprocket and Trantorque
®
.
DRIVE SPROCKET INSTALLATION
• STEP 1 – Clean the drive shaft and Trantorque
®
surfaces
well before installation (Isopropyl alcohol is reccommended,
to remove grease or hydraulic fluid).
Note: Do not lubricate Trantorque
®
or shaft as slippage
may occur.
• STEP 2 – Slide the Trantorque
®
shaft adaptor onto drive
shaft until it bottoms on the shaft. Note: Do not lubricate
Trantorque
®
or shaft as slippage may occur.
• STEP 3 – Slide drive sprocket onto the Trantorque
®
until it
hits the bottom of the shaft.
• STEP 4 – While holding the sprocket and Trantorque
®
as
close to the frame of the saw as possible, finger tighten
Trantorque
®
shaft adaptor.
• STEP 5 – Stop the sprocket from rotating by inserting a
scrench or screwdriver through the holes in the sprocket and
the hole in the saw body.
• STEP 6 – Tighten the Trantorque
®
shaft adapter with a torque
wrench and a 7/8 in socket to 200 in-lbs (22.6 Nm). When a
torque wrench is not available, use a 7/8 in box end wrench
and tighten one-half turn past finger tight.
Note: Do not turn around or reverse the direction of the
drive sprocket to extend sprocket tooth life. Damage to
chain or drive links may occur.