C9 Idler Wheel Pulley MaintenancePopular
Ask Dave / Posted 3 years ago / 741 views
|Question: – Dave, is there a C-9 400 hp mileage at which to change out the idler wheel pulley. We currently have 143k on our Beaver Contessa. With our last Beaver Patriot with a C 7 the idler pulley froze up at 120k. Thanks in advance for the info.|
Dave’s Answer: No there is not. One of Caterpillar’s better ideas ( not ), was placing a sealed bearing on on-road engines and off-road heavy equipment. The pulley bearing has been a very common failure point on CAT engines.
You can correct the problem by by putting a grease fitting at the shaft and bearing. To do this remove the pulley from the shaft and drill a hole down the center of shaft about 1 1/2 inches, then drill a hole 3/16 diameter at a right angle to meet the shaft hole. Drill that one half way through. This will allow grease in between both bearings and pulley. Tap thread the 3/16 hole for a 1/8 grease zerk fitting. Any good machine shop should be able to do the job in 45 minutes. It’s a good idea to install a new pulley with the addition of the lube point.