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Polyair Springs
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POLYAIR Springs

Q & A - ANSWERS TO COMMON QUESTIONS

Q: How much do they cost?

  1. Polyair Springs are excellent value, being the most economically priced suspension aid product on the market. They frequently are lower in price than replacement or overload springs and air shocks. Since price varies with application, refer to the current price list.

Q. Do I have to remove my springs to install them?

  1. The Polyair Spring is a suspension add-on to original equipment springs. Some kit numbers will require temporary removal of spring for installation.

Q. Will they raise my vehicle?

  1. Original equipment springs tend to sag from wear or from overloading. Each Polyair cylinder is designed to level the vehicle to original designed height with up to 500 kg of load. Some vehicles can be raised an additional 25 mm when inflated with maximum air pressure and carrying minimum load.

Q. How do I fill them and how much air do I need?

  1. Due to low air pressure requirements, Polyairs can be inflated using a hand pump or service station hose, as you would fill a tyre. All kits include air hoses for easy inflation of dual air valves.

Q. What is the warranty?

  1. Polyairs have 12 months / 20,000 km warranty. Any defective part will be replaced free, provided the kit has been correctly installed and correct inflation procedures have been adhered to.

Q. Will they affect the ride of the vehicle?

  1. The ride can be tailored to meet the driver's personal comfort by increasing or decreasing air pressure. If air pressure is increased in proportion to the load, ride quality should not change.

Q. Will the rubbing action of the coil spring on the Polyair cylinder cause it to wear out?

  1. Polyairs are made of a highly durable space age urethane material which has outstanding wearing characteristics in desert hot to sub-zero temperature extremes. When properly inflated, they will provide years and years of trouble-free service.

Q. Do I have to change my shock absorber?

  1. Not if they are functioning properly. In fact, Polyairs will actually increase the life of the shock absorber.

Q. Have they been tested in Australian conditions?

  1. The air bags have been successfully marketed in Australia since the early 1960s.

GENERAL GUIDELINES

POLYAIR units are designed and engineered for long life. Provided you take a little amount of care when selecting and fitting your kit, maximum results will be obtained.

LEAF SPRINGS

  • Stands or Jacks should be placed under differential housing so that dimensional relationship between vehicle chassis and Leaf Springs remains unaffected. A correctly attached chassis bracket has no stress on the attaching screws.
  • Kits are to be fitted not more than 40 mm and not less than 20 mm in front of or behind the differential housing, usually fitting instructions specify the correct location, depending on positions of brake lines, exhaust pipes, petrol tanks, shock absorbers and other obstructions. Should any of these have been altered from original specifications then repositioning of the kit may be necessary.
  • Clearance from any obstructions should be a minimum of 20 mm (Exhaust Pipes 60 mm at all times).

COIL SPRINGS

  • Most bags can be fitted between the lowest coil opening when suspension is fully extended. Additional clearance between the coil may be obtained by removing lower shock absorber mountings and lowering suspension 30-50mm.
  • Bag should be a reasonably snug fit in the coil, however tolerance of +/- 6mm is common.
  • CAUTION: Observe tension on brake hose. DO NOT STRAIN.
  • (If the vehicle has a hole between bag and spring seat / chassis of 50 mm / 2" or more than half the diameter of the bag (whichever is the smaller) then a protector must be fitted. This is normally included in the kit.
  • Ensure that exhaust tail pipe is 60 mm from Polyair Bag. If necessary, loosen clamps and rotate or move to obtain additional clearance.

IMPORTANT - BOTH LEAF AND COIL

All vehicle springs will sag, and the amount of sag depends on age and usage conditions (eg load variety, towing etc). As the kit is designed to fit the vehicle's as new specifications, an older vehicle will probably require a few more KPAs when unladen to restore it to original ride heights and this factor will vary by how much the front may have sagged.

All kits are supplied with fitting instructions and air extension hoses.

Should it be necessary, POLYAIR SPRINGS can supply kits specially tailored to suit an off-standard situation such as Raised or Lowered Suspension Systems or BADLY SAGGED suspensions.

If your vehicle is not listed or does not conform to the specification list, let us have the inside diameter of your coil, the length required for your air bag (measured when the vehicle is empty standing on level ground). Please mention in addition if any obstruction and/or holes are at the top or bottom of your existing coil springs.

LOW PRESSURE GAUGE: To prevent damage to the air bags, a minimum pressure of 35 KPA / 5 PSI should be retained in the bags of standard kits at all times. A special low pressure dual dial gauge with readings from "2" to "60" lbs (10-400 KPA) accurate to within 2% of scale for this critical low pressure air adjustment in POLYAIR SPRINGS is available. The gauge will double up as a tyre gauge.

CAUTION: Leave sufficient hose slack to prevent any strain on valve stem during axle motions. To prevent extension from melting, keep it at least 60 mm from exhaust system.

GENERAL MAINTENANCE TIPS: After fitting kits and/or extension leads, inflate air bags to 175 KPA / 25 lbs and test for air leaks by applying a liquid soapy solution to all valve cores, fittings and connections.

Caution - Do not inflate air springs while vehicle is on frame hoist. Vehicle must be standing on its wheels before bags are inflated.

  • Maintain at least 35 KPA / 5 PSI of air pressure in the Air Lift Bags to prevent chaffing.
  • Inflate your Air Bags before loading your vehicle to maximum pressure indicated on fitting instructions.
  • Do not attempt to raise a loaded vehicle by inflating Air Bags. If loaded, jack up body until level, then inflate.
  • It is recommended that tyre pressure be increased by 14 KPA (2 lbs) above normal for each 45 kg / 100 lbs total overload on the axle.
  • POLYAIR SPRINGS recommends that the kits be used to support loads which are within the vehicle manufacturer's rated GVW.

Recommended standard Air Lift Bag pressures are included in installation instructions and vary from kit to kit. Typical values are min 35 KPA / 5 lbs, max 175 KPA / 25 lbs.

POLYAIR SPRINGS - 4WD APPLICATIONS

KIT NO MAKE VEHICLE  MODEL
78803 TOYOTA HILUX 2WD YN58 12/1987 – TRAY BACK ONLY
78703 TOYOTA HILUX 4WD & 2WD (FITTED IN FRONT OF AXLE, STD HEIGHT SUSPENSIONS)
75703 TOYOTA HILUX 4WD EXTRA CAB YN67R-500, YN104 8/1983 – 8/1988 (FITTED BEHIND REAR AXLE)
78903 TOYOTA HILUX 4WD WITH 2" RAISED SUSPENSION (FITTED IN FRONT OF REAR AXLE)
72998 TOYOTA LANDCRUISER 60 SERIES WITH 2" RAISED SUSPENSION
72998 TOYOTA LANDCRUISER BJ40, 42 (MEASURE 1" & 7" IN FRONT OF AXLE)
72906 TOYOTA LANDCRUISER BJ45, FJ45, HJ45, HJ47 (MEASURE 1" & 7" IN FRONT OF AXLE)
72798 TOYOTA LANDCRUISER FJ60, HJ60 (STD HEIGHT SUSPENSION)
72098 TOYOTA LANDCRUISER HJ75 WITH 2" RAISED SUSPENSION
72198 TOYOTA LANDCRUISER HJ75 WITH 3" RAISED SUSPENSION
F72603 TOYOTA LANDCRUISER HJ75 & FJ75 FRONT AXLE KIT
72898 TOYOTA LANDCRUISER HJ75 (STD HEIGHT SUSPENSION)
15995 TOYOTA LANDCRUISER 80 SERIES 1990-7/91STD HEIGHT
15895 TOYOTA LANDCRUISER 80 SERIES 8/91-12/94 STD HEIGHT
15095 TOYOTA LANDCRUISER 80 SERIES 1990-7/91 1" RAISED
95996 TOYOTA LANDCRUISER 80 SERIES 1990-7/91 2" RAISED
15995 TOYOTA LANDCRUISER 80 SERIES 8/91-12/94 1" RAISED
15095 TOYOTA LANDCRUISER 80 SERIES 8/91-12/94 2" RAISED
15895 TOYOTA LANDCRUISER 80 SERIES 1995- STD HEIGHT
15995 TOYOTA LANDCRUISER 80 SERIES 1995- 1"-1" RAISED
15095 TOYOTA LANDCRUISER 80 SERIES 1995 – 2"-2" RAISED
F12694 TOYOTA LANDCRUISER 80 SERIES FRONT AXLE KIT 1990 – (STD HEIGHT SUSPENSION)
15790 TOYOTA 4 RUNNER 1988-97 WITH 2" RAISED SUSPENSION (REAR COIL SPRINGS)
15690 TOYOTA 4 RUNNER 1988-97 (STD HEIGHT COIL SPRING REAR)
75698 TOYOTA 4 RUNNER LN61-63, YN63 (REAR LEAF SPRINGS)
61792 TOYOTA PRADO 96- (STD HEIGHT SUSPENSION)
61996 NISSAN PATHFINDER WD21 1987-95 (LADDER CHASSIS)
12691 NISSAN PATHFINDER 1995 - (NEW SHAPE)
95096 NISSAN PATROL GQ-GU 4WD LWB & COIL SPRING CAB CHASSIS WITH 2" RAISED SUSPENSION
95097 NISSAN PATROL GQ-GU 4WD LWB & COIL SPRING CAB CHASSIS (STD HEIGHT SUSPENSION)
F15690 NISSAN PATROL GQ-GU FRONT AXLE KIT (STD HEIGHT SUSPENSION)
72806 NISSAN PATROL GQ LWB CAB CHASSIS (LEAF SPRING REAR)
72606 NISSAN PATROL MQ (REQUIRES VERTICAL MEASUREMENT 1" IN FRONT OF AXLE)
72906 NISSAN PATROL MQ (REQUIRES VERTICAL MEASUREMENT 1" IN FRONT OF AXLE)
95997 NISSAN PATROL GQ-GU SWB (STD HEIGHT REAR SUSPENSION)
61894 NISSAN TERRANO
75798 NISSAN 620/720 UTE 2WD (INCL KING CAB UTE)
72798 MITSUBISHI PAJERO NA-NJ 1983 – (LEAF SPRINGS REAR)
15898 MITSUBISHI PAJERO NF-NG 1988-1991 (COIL SPRING REAR)
95893 MITSUBISHI PAJERO NH-NJ 1991 – (CURRENT SHAPE)
72998 MITSUBISHI TRITON UTE 4WD 10/86 – (JAPANESE ASSEMBLY)
92099 LAND ROVER DISCOVERY (STD SUSPENSION)
95098 LAND ROVER 110 SERIES & DEFENDER (STD REAR SUSPENSION)
95095 LAND ROVER 110 SERIES & DEFENDER WITH 2" RAISED SUSPENSION
94091 LAND ROVER 130 SERIES, CAB CHASSIS (4 COIL SPRING REAR)
92096 LAND ROVER DISCOVERY WITH 2" RAISED SUSPENSION
92099 LAND ROVER RANGE ROVER (STD HEIGHT)
92096 LAND ROVER RANGE ROVER WITH 2" RAISED SUSPENSION
99988 LAND ROVER SERIES 1, 2 & 3
75606 FORD EXPLORER
F15690 FORD MAVERICK FRONT AXLE KIT (STD HEIGHT SUSPENSION)
95096 FORD MAVERICK LWB & CAB CHASSIS WITH 2" RAISED SUSPENSION (COIL REAR SPRINGS)
95097 FORD MAVERICK LWB & CAB CHASSIS (COIL REAR SPRINGS STD HEIGHT SUSPENSION)
72806 FORD MAVERICK LWB CAB CHASSIS (LEAF SPRINGS REAR)
95997 FORD MAVERICK SWB (STD HEIGHT SUSPENSION)
75598 FORD RAIDER 4WD & COURIER 4WD
61994 HOLDEN FRONTERA 96 -
75703 HOLDEN JACKAROO (LEAF REAR SPRINGS) 1982-91
11093 HOLDEN JACKAROO (COIL REAR SPRINGS) 1991 -
75703 HOLDEN RODEO 4WD 1981-87
75095 HOLDEN RODEO 4WD 1988 -
75603 JEEP CJ SERIES 1945-71
99665 JEEP CHEROKEE 1962-83 (WITH A MINIMUM CLEARANCE OF 5.75" BETWEEN TYRE & CHASSIS)
34007 JEEP CHEROKEE SPORT, CLASSIC & LIMITED 1994 – (LEAF SPRING REAR)
11691 JEEP GRAND CHEROKEE LAREDO & LIMITED 1995 – (COIL SPRING REAR)
15692 JEEP WRANGLER SPORT & RENEGADE 1996 - (COIL SPRING REAR)
61894 SSANGYONG MUSSO 1992 -

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