Forklift Parts Control Unit 3515421213 Steering Orbitrol For Linde 351-05-1283

Linde Steering Orbitrol — 3515421213 / 351-05-1283

The Linde steering orbitrol is a hydraulic orbital steering control unit — the rotary valve and gerotor metering assembly mounted at the base of the steering column that converts the operator steering wheel rotation into proportional hydraulic oil flow to the steering cylinder. When the steering wheel is turned, the orbitrol meters a precise volume of oil to the steering cylinder for each degree of wheel rotation, providing power-assisted steering with a direct mechanical connection between the steering wheel and the steered wheels. A worn orbitrol with internal spool-sleeve leakage causes steering wheel free play, wandering at speed, and increased steering effort — the operator must turn the wheel further before the wheels begin to move.

Manufactured to the Linde OEM specifications 3515421213 and 351-05-1283, this steering orbitrol features a hardened and ground spool-and-sleeve assembly with precision-matched clearances that control the oil metering to the steering cylinder. The internal gerotor acts as both a metering pump and a manual backup — if the main hydraulic pump fails, the orbitrol gerotor can be driven manually by the steering wheel to provide emergency steering, albeit with significantly higher steering effort. The spring centering mechanism returns the spool to neutral when the steering wheel is released, stopping oil flow to the cylinder and holding the wheels at the selected steering angle.

Direct OEM replacement for Linde H14-H50 series forklifts equipped with the 3515421213 / 351-05-1283 steering orbitrol. For hydraulic pumps, steering cylinders, and seals, browse our forklift hydraulic components.

Technical Specifications

• SKU / OEM PN: 3515421213 / 351-05-1283
• Type: Hydraulic orbital steering control unit (orbitrol)
• Operation: Rotary spool-sleeve metering + gerotor backup
• Emergency Steering: Manual gerotor backup if pump fails
• Centering: Spring-return to neutral
• Fitment: Linde H14-H50 forklifts

Compatible Forklift Brands

Each Linde orbitrol ships with ports capped and the spool-sleeve assembly protected. After installation, bleed the steering circuit by turning the steering wheel lock-to-lock several times with the engine at idle until steering effort becomes consistent and the wheel returns smoothly to center. Air trapped in the orbitrol causes spongy steering and imprecise wheel centering. For Linde steering system specifications, consult Baldwin Filters. Kingstream stocks the Linde 3515421213 — worldwide freight shipping with online tracking.