Argo All 6X6, Service Manual

Page: 157 / 297

Wheels, Axles & Chains Argo Service Manual
WA-12
IMPORTANT
Check that the cam assembly is
progressing properly. Check for proper
chain tensioner operation every 10 hours
of vehicle operation, when the drive chains
are being lubricated. Each step of the cam
takes up about 3 inches of chain slack
Drive Chain Take-Up System Inspection
Scissor Style
The scissor style chain tensioning system
consists of a torsion springed upper and
lower slider block. As the chain wears,
the chain tensioning mechanism adjusts
automatically by squeezing the chain from
both top and bottom. Replace chains when
upper and lower chain start to contact each
other.
Chain Tenioner Slider Block Inspection
Each chain tensioner system consists of
either a single UHMW slider block (situated
below the lower chain) or two slider blocks
(situated above and below the drive chain).
Inspect the UHMW slider blocks for wear
every 50 hours. Replace the blocks when
the wear groove measures 1/4" (6mm).
Replacing A Slider Block (Semi-Self Adjust)
1. Remove the floor pans.
2. Turn the tensioner cam assembly in the direction which winds up the torsion spring
and push the assembly down as close as possible to the cam follower block across the
bottom of the frame channels.
See following page.
Clamp it in this position with a
Vice-Grip 10CR or similar plier and perform the servicing procedure,
Removing The
Drive Chain.
3. With pliers, pry the slider block off the cam assembly.
4. Place a new slider block over the shaft of the cam assembly.
5. Using a piece of wood (or similar material) pressed against the top of the slider block,
carefully hammer the piece of wood so the slider block snaps onto the cam assembly
shaft.
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