Service manual

Wheels, Axles & Chains Argo Service Manual
Ontario Drive & Gear Limited www.odg.com
PH.(519)- 662-2840 FAX (519)- 662-2421
WA-12
Check for proper chain tensioner operation every 10 hours of vehicle operation.
The tensioner cannot progress to the next step until there is enough slack in the chain.
With the wheels raised off the ground, check if the chain slack exceeds 2.5 inches. If it
does, then reach under the slider block assembly and pull up.
It is very important to check that
the cam assembly is progressing
properly. Check for proper chain
tensioner operation after the intial
2 hours of vehicle break in and then
every 10 hours of vehicle operation,
when the drive chains are being
lubricated. Each step of the cam
takes up about 2.5 inches of chain
slack. DIAGRAM WA-15
IMPORTANT
WA-15
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 On 8x8 models manufactured from serial numbers CB16049 & RB16104, or
6x6 models from serial numbers C12747, BF9212, SN10191 & S10178:
This chain tensioning system consists of a torsion spring loaded cam assembly with a
slider block which takes up the slack on the bottom side of all but the front final drive
chains. As the chain wears, the chain tensioning mechanism adjusts semi-automatically.
Under most conditions, the tensioner cam assembly will move to the next step of
adjustment simply due to normal drive system dynamics. Sometimes, however, the cam
assembly can bind due to debris caught in the area.
Maintenance Interval - Inspect every 10 hours of vehicle operation.
1. The friction of the chains will cause wear to the nylon slider blocks in the chain
tensioning system. Inspect the face of each slider block.
2. If the wear groove on the slider block, is 1/4" (6mm) or greater, replace the nylon
slider block. DIAGRAM WA-13 on previous page.
Chain Tensioner Inspection (Later Style)