Autopapyrus · Honda StepWGN (2nd generation, RF)
https://autopapyrus.com/guides/honda/stepwgn/reassembling-and-installing-the-power-steering-pump-after-repair/
https://autopapyrus.com/guides/honda/stepwgn/reassembling-and-installing-the-power-steering-pump-after-repair/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.
Honda StepWGN (2nd generation, RF): Reassembling and Installing the Power Steering Pump After Repair
After repair, the power steering pump on a StepWGN with the K20A engine must be reassembled in a clean environment, with new seals and with the parts lubricated with working fluid. After installation, the system must be bled thoroughly without overheating the pump. Exact torque specifications for this model were not found in publicly available sources, so typical ranges for pumps of this type are given below.
Parts
4| № | Part |
|---|---|
| 01 | Power steering pump repair kit (shaft seal, O-rings, cover gasket) |
| 02 | Honda PSF power steering fluid |
| 03 | Pressure fitting sealing washers |
| 04 | Accessory drive beltif worn |
Tools
8- Socket and wrench set (10, 12, 14, 17 mm)
- torque wrench
- syringe or fluid bulb
- drain pan
- clean rags
- seal and O-ring repair kit
- copper or aluminum washer for the fitting
- bleeding hose
Step by step
15 steps- Prepare a clean work area. Wash all pump parts (housing, rotor, vanes, cam ring, side plates, pressure relief valve) with clean power steering fluid or cleaner and blow them dry. Any dirt or abrasive quickly destroys the rotor/cam ring pair.
- Inspect the parts: the vanes must slide freely in the rotor slots, and the cam ring and side plates must not have scoring or stepped wear. Replace worn parts; often a complete pump turns out to be the better value.
- Replace all rubber O-rings and the shaft seal with new ones. Lubricate them with power steering fluid. Press the seal in squarely, using a driver on the outer casing, until it bottoms out, with the spring lip facing inward toward the fluid.
- Assemble the pump in the reverse order of disassembly: plate, cam ring (observe the orientation by the dowel pin and chamfer), rotor with vanes (beveled edge of each vane facing the direction of rotation), second plate, gasket and cover. Lubricate all parts with power steering fluid.
- Tighten the pump cover bolts in a crisscross pattern in 2-3 passes. Approximately 20-30 N·m (15-22 lb-ft) (for the exact value, see the manufacturer's service manual). The shaft must turn smoothly by hand, without binding.
- Install the pressure relief (bypass) valve with its spring and a new seal, and tighten the plug to approximately 40-60 N·m (30-44 lb-ft) (verify with the service manual).
- Attach the reservoir to the pump with a new O-ring on the reservoir neck. If the reservoir is separate, connect the hoses using new clamps.
- Install the pump on the engine bracket. Tighten the mounting bolts to approximately 22-45 N·m (16-33 lb-ft) (per the manufacturer's service manual). Before final tightening, set the pump position for belt tensioning.
- Connect the pressure hose using new sealing washers. Tighten the fitting to approximately 30-50 N·m (22-37 lb-ft) (per the service manual), and connect the return hose with a new clamp.
- Install the drive belt and adjust the tension: deflection of about 8-12 mm on the middle span under a force of about 10 kg (22 lb). Tighten the tensioner fasteners. Check that the belt is not cracked or oil-soaked.
- Fill with Honda PSF fluid to the MAX mark on the cold reservoir.
- Bleeding. Lift the front wheels off the ground. With the engine off, turn the steering wheel from lock to lock 10-15 times until the fluid level stops dropping, and top up the fluid as needed.
- Start the engine and let it idle. Turn the steering wheel slowly from lock to lock, without holding it at the extreme positions for longer than 3-5 seconds, topping up the fluid as you go. Continue until the air bubbles and foam in the reservoir disappear and the pump whine stops.
- Inspect all connections for leaks. Check the level with the engine warm (against the HOT/MAX mark) and top up if necessary.
- Take a test drive. The steering wheel should turn easily and smoothly, without jerking or whining. After the drive, check the fluid level and look for leaks once more.
Common mistakes and warnings
- Steering is a safety system
- If you have no experience repairing power steering, leave the pump assembly and installation to a repair shop
- Do not use ATF or other fluids instead of Honda PSF without confirmed approval
- Do not hold the steering wheel at full lock for long, or the pump will overheat and wear out
- Foam or noise after bleeding indicates air in the system; repeat the bleeding procedure