Motor Grader Brake Relay Valve – Circuit and Release Guide
This brake relay / control valve must be matched to the exact motor grader system. This page distinguishes the second brake-valve record by focusing on relay or circuit-control behaviour rather than the pedal interface. Similar-looking parts can use different internal or mounting details.
Ordering basis: Confirm air or hydraulic circuit, supply and delivery ports, mounting, release function and valve markings before ordering.
Information buyers should provide
Machine model, serial number and installed location.
All casting, stamped or label numbers.
Clear photographs of every connection and mounting face.
Measurements for air or hydraulic circuit, supply and delivery ports, mounting, release function and valve markings.
Diagnose the surrounding system
Inspect the mating components, fluid or mechanical condition and the original failure pattern. This page distinguishes the second brake-valve record by focusing on relay or circuit-control behaviour rather than the pedal interface. Replacing the part without correcting contamination, misalignment or adjustment faults can cause repeat damage.
Installation and functional verification
Keep interfaces clean, compare the old and replacement parts side by side and follow the machine service procedure. After installation, check leakage, free movement, noise, temperature and the related machine function under controlled conditions.
Product record
| Component | Brake relay / control valve |
| Part number | Not shown — verify from the original component or parts catalogue |
| Fitment rule | air or hydraulic circuit, supply and delivery ports, mounting, release function and valve markings |
Related product reference
Review the motor grader service-brake valve guide for another component-level identification workflow. The linked product is a reference only and does not establish interchangeability.
FAQ
Can this brake relay / control valve be matched from a photograph?
A photograph helps, but air or hydraulic circuit, supply and delivery ports, mounting, release function and valve markings must also be verified.
What should be inspected before installation?
Check mating parts, mounting faces, lines or fasteners and the cause of the original failure.
Why are unverified model claims avoided?
The original record does not contain enough evidence to prove a specific model fitment.
Compatibility note: Final selection requires air or hydraulic circuit, supply and delivery ports, mounting, release function and valve markings.
