7 Leaf x 60mm Jayco Leaf Spring – 705mm

7 Leaf x 60mm x 705mm Caravan Spring fits Jayco Caravans and More

7 Leaf x 60mm caravan spring fits Jayco. It is expected to use replacement 705mm Shackle Springs on Jayco and other manufacturers’ tandem setups.

Springs are always measured when no load is applied. When springs are installed, the camber will shrink and the springs will lengthen.

It is important to note that your existing older spring will almost certainly be longer than 705mm because it is aged. If it is shorter then you are chosin gthe wrong spring, look at the 576066 or 576067

As springs age they lose camber and flatten. The next spring length to this spring is 840mm, therefore if you sprin gis close to 705, maybe 720 or longer then it has flattened out.

Should I replace all springs when one spring broken or flattened?

In an emergency, on holidays and stuck in an outback town, the best thing to do is to replace the broken spring and continue your journey.

At a suitable time, visit a weight bridge and weight your rig because it is likely the rig is heavier than you think.

Now your rig has the correct weight, consider replacing the other spring because it is likely to be damaged also.

You might even be surprised to learn that you need a spring upgrade becuase your existing spring is both under rated and over working.

If you need more information on the right course of action, call the experts on 0733483822 and we’ll help you though ensuring your rig is in great shape for the highway.

Important: Spring offset is 50mm from the centre of the spring.

• 705mm Eye to Eye.
• 16mm (ID) x 22mm (OD) x 60mm bush (long).
• Free Camber 120mm
• Eye to Center Bolt 386mm
• 6mm Thick Leaves
• Nominal axle centres 912mm

Spring failures often occur due to the additional equipment loaded into your caravan over the years. We suggest putting your trailer over a weighbridge to get your exact loading or upgrading from a five-leaf spring to a six-leaf spring.

705mm x 60mm springs are available in the following configurations:

• 5 Leaf – 500kg per spring or 1000kg per tandem kit
• 6 Leaf – 750kg per spring or 1500kg per tandem kit.
• 7 Leaf – 850 kilograms per spring or 1700kg per tandem kit.

Purchase complete sides here, including rockers, hangers, and shackle pins.

Installation Tips

• Hanger Centres are 730mm for single axle installations.
• Hanger centres are 825mm for tandem configurations (as seen below).

60mm Tandem Spring Parts

• 60mm Standard Tandem Shackle Kit
• Shackle Bolts and Kits for Caravans and Trailers
• 60mm Front and Rear Hangers
• Tandem Rocker Arm to suit| 45mm-60mm Springs
• 45mm Square x M16 U-Bolt Kit – 150mm Long
• 50mm Square x M16 U-Bolt Kit – 180mm Long

Upgrade Tips

• Upgrade by one leaf if your springs have flattened
• Maximum compression is 50mm
• If in doubt, get a weighbridge certificate
• Old spring may be flat and measure longer than usual

Broken Springs

Springs break in only two places for specific causes: they are

• Breaks near the eye are caused by shock loading when the spring is loaded close to or over total capacity. Breakage occurs on the second top leaf just in front of the end of the third leaf
• Uneven tensioning of fishplates causes breaks near the centre bolt. Rattle guns are a significant cause of the uneven tightening of U-bolts

Click here for more reading on caravan spring choices.

Spring upgrades are not uncommon on tandem setups. They tend to reinvigorate your caravan’s towing capacity to a new standard.

60mm wide shackle is more adaptive and can withstand shock loading and twist better than 45mm springs.

Used in either tandem or single axle setups. Upgrading broken springs to the following load capacity is prevalent.

Click here for an essential article on weighbridge certificates.

Springs are shipped from Queensland, Australia.

Why do some springs break prematurely or lose spring tension? Read about vibration fatigue here.