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QAF500110 - Power Steering Box – RHD – Lightweight – With Arm

Original price - Original price €830,00
Original price
€830,00
€830,00 - €830,00
Current price €830,00
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Power Steering Box of the Adwest lightweight type, right-hand drive, supplied complete with the drop arm.

The steering box is the mechanical heart of the steering hydraulic circuit. Rotation of the steering column shaft enters the box input; pressurised fluid delivered by the power steering pump through the high-pressure feed hose is metered by the internal rotary valve to assist the recirculating-ball mechanism, and spent fluid leaves through the return hose to the reservoir. The resulting motion swings the sector shaft and drop arm, which drives the drag link to the swivel steering arm.

Internal wear typically shows as free play at the steering wheel, wander at speed, or fluid weeping past the sector shaft seal.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1987-2006 — power steering box (Adwest), lightweight, RHD, with drop arm
Alternative Codes
STC837QAF500110NTC1580NTC8416QAF000140QAF500030STC2846STC398STC887

In stock 2 units
1 · Gouda 1 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the STC837 power steering box?
The STC837 is a lightweight-type power steering box for right-hand-drive Land Rovers, supplied complete with the drop arm fitted. It's the Adwest-pattern box used on the Defender, Discovery 1, and Range Rover Classic, converting steering wheel input into movement at the drag link.
Where does the steering box mount?
The power steering box mounts on the chassis rail behind the front bumper on the right-hand-drive side, with the drop arm connecting to the steering linkage below. It's fed by the power steering pump and steers the front wheels via the drag link on Defender, Discovery 1, and Range Rover Classic.
What are the signs a steering box needs replacing?
A worn steering box typically shows as excessive steering play, a fluid leak from the sector shaft seal, or stiff steering. On Defender, Discovery 1, and Range Rover Classic the box wears with age and mileage, and internal wear can't always be adjusted out, so replacement is common.
Will the STC837 fit a left-hand-drive vehicle?
The STC837 is a right-hand-drive steering box, so it won't fit left-hand-drive vehicles, which use a different box. It's the lightweight Adwest type with the drop arm included, for RHD Defender, Discovery 1, and Range Rover Classic. Confirm your steering box type before ordering.