45mm Spring Bush to suit most 45mm wide springs in including galvanised boat trailer springs. Couplemate bushes are a precision fit.
It can be can be difficult to find a good nylon bush. The best nylon bushes have the following qualities:
- Good fit both externally and internally.
- The material should not chatter or chip upon insertion.
- Shackle bolts should not be loose inside the nylon bush.
- Your bush should be a tight fit inside your spring.
45mm Bushes are available in the following sizes
- 1/2 x 7/8 x 45mm
- 9/16 x 7/8 x 45mm
- 9/16 x 3/4 x 45mm
- 5/8 x 7/8 x 45mm
- 1/2 x 3/4 x 45mm
Nylon bushes are popular because they are self-lubricating and hard-wearing. As a precautionary measure replace shackle bolts when replacing nylon bushes.
Vibration fatigue causes wear on bushes, shackle bolts and shackle plates. Check your shackle bolts for wear during your pre-trip inspections.
TIP: Replacing your old bush is easy. Simply place the new bush on top of the old bush and knock the new bush in with a hammer.
All of your bushes, bolts and shackle plates are easy to replace providing you have the right parts. These types of parts can be difficult to locate, however, Couplemate
In some cases, owners may wish to insert steel bushes and switch to a greaseable shackle system. New hardened steel bushes are available from Couplemate.
Spring bushes shackle bolts and shackle plates are all subject to vibration fatigue. Read about vibration fatigue here.
Vibration fatigue can be substantially lowered with Caravan shock absorbers available here.