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STEP 6
Installing Calmer 7-Tooth Drive and 9-Tooth
Idler Sprockets and Gathering Chains
1. Inspect chain guides & idler blocks for wear.
Important: You must use stainless steel washers with Calmer’s 9-Tooth Idler.
Some modification may be required when installing. (See below)
2. Disassemble the old idler sprocket.
Gathering Chain Tighteners
Gathering chain tighteners occasionally lock up. This is caused when the spring vibrates and au-
gers itself into the hole between the bolt and the flat strap. This can be fixed by removing the idler
bolt and adding a second washer (enclosed) at thebottom of the pipe spacer, which is identical to
the washer at the top of the pipe spacer (See photo below). Apply anti-seize or lubricant to the bolt
threads for future adjustments.
3. Inspect to see if plow bolt shoulder extends above the idler strap.
• If the plow bolt shoulder extends above the idler strap then you must smooth-out the shoulder
with a grinder until flush with the idler strap.
• If the plow bold shoulder is flush or does not extend above the
idler strap, no further modification is required.
Install enclosed washer
here leaving about 2
spring wire widths
LOWER IDLER SPRING
WASHER/CHAIN
TIGHTENER WASHER
GATHERING
CHAIN
TIGHTENER
