M18 Greaseable Shackle Bolt
M18 greaseable shackle bolt is the centre bolt used on rocker roller suspension arms. Worn bolts often cause the entire arm to be replaced.
However, Couplemate now manufactures a replacement bush for rocker roller arms.
How do I measure my shackle bolt?
Measure from the tip of the thread to the underside of the hex head.
18mm Worn Rocker Roller Hangers
There is no fix for worn hangers other than replacement.
The knurl under the head of a greaseable shackle bolt has a particular purpose. The knurl locks into the shackle plate to help prevent the bolt from spinning during spring compressions. Broken welds are a good sign the bolts need replacement.
The knurl is welded onto the shackle plate on the outback trailer springs to stop the bolt from turning. With a rotating bolt in the shackle plate, wear significantly increases.
News: How to fix Dangerous Caravan Vibration Fatigue
How to tighten suspension bolts.
- Tighten 18mm x 100mm greaseable shackle bolt until home.
- Back off 1/4 turn.
- You need a small space between your hanger and the rocker’s arm; otherwise, you will develop an annoying squeak.
- This squeak is due to no tolerance between the arm and the hanger leg.
Associated Bolts and Bushes
- M18 Standard Tandem Greaseable Shackle Bolt
- M16 Greaseable Shackle Bolt
- M16 Non-Greaseable Shackle Bolt
- 18mm – 22mm Rocker Roller Bush
Replacement Shackle Bolts, Caravan Trailer Kits
Additional information
Weight | 0.1 kg |
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Dimensions | 10 × 2 × 2 cm |
Our Service Lifetime Warranty
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.
Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.
Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.
60-Day Returns
After 60 years of experience, we know that life has its unpredictable moments.
All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.
You can view our full policy for change-of-mind returns here.
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