How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask catmastertech Your Own Question
catmastertech
catmastertech, Technician
Category: Heavy Equipment
Satisfied Customers: 2304
Experience:  19 years Cat, 3 years Case
11546476
Type Your Heavy Equipment Question Here...
catmastertech is online now
A new question is answered every 9 seconds

clunks when shifting from foward to reverse..gearbox and i..rear axle

Resolved Question:

I have a 950G cat loader that clunks when shifting from foward to reverse . The machine recently had a new ECU for the gearbox and i have replaced the bushes in the rear axle oscillation.
Submitted: 5 years ago.
Category: Heavy Equipment
Expert:  catmastertech replied 5 years ago.

Donnie :

The axle oscillation bushings was a good call, most people miss that as a source of noise.

Donnie :

Another issue could be the center drive shaft. This joint should be replaced every 10,000 hours or earlier for severe conditions. Using chains are mismatched tire will cause excessive strain on the slip joint.

Donnie :

This will also cause a slight vibration when turning.

Donnie :

Don't forget to inspect all engine and transmission mounts. If they get oil in them the rubber will deteriorate and allow the engine to rock around too much. This can also add strain on the drive shafts.

Donnie :

Inspect the slip yokes in the axles, the splines here can wear too. Excessive wear can cause them to strip out This is usually just the yoke and not the axle pinion that wears.

Donnie :

Sometimes it can be the cylinders sliding side to side when the load is light. I have even had a couple of loose cab mounts make noise.

Donnie :

Loose steering cylinders will also slap in the pin mounts. Not many use the tapered pins and straight pin will make noise when the bore is worn.

Donnie :

I can't think of anything else. Let me know if you need more information on any of these ideas. Please post your serial number if you do need help.

catmastertech and other Heavy Equipment Specialists are ready to help you