Description
85MM INTERMEDIATE HEAD PLATE & UNLOADER
PART NUMBER(S):
Fleet Products: 9111539214
OE: 9111535100, 9111535200, 9111535300, 9111535400
DESCRIPTION:
Model: WABCO SS318 Intermediate Head Plate & Unloader (Generation #1 Plate)
Vehicles: Fitment to WABCO SS318 twin-cylinder air compressors
• Bore size: 85mm
• Water port: M18 – 1.5 STOR
• Discharge port: M27 – 2.0 STOR
• Governor port: M10 – 1.0 STOR
• Function: Intermediate head plate with integral unloader mechanism
• Designed for air compressor models 9111535100, 9111535200, 9111535300, 9111535400 (Generation #1 Plate)
Applications:
Used in WABCO SS318 air compressors to control unloading of air pressure during compressor cycling, ensuring efficient system operation and pressure regulation.
CROSS-REFERENCE(S):
WAB61W24VP, 9111530230, 9111539360, 9111539214, 9111535100X, 9111535200X, 9111535313X, 9111535330X, 9111535400X, 3936810, 3936810RX, 4936214, 3944524, 3966522, 3944526, 3944525, 3558163,
A cross-reference listing means the part is a direct equivalent or suitable replacement for the referenced numbers.
IMPORTANT INSTALLATION NOTES:
✔ Oil sliding leaf valve and inlet valve before installation. Ensure correct alignment of valves and gasket.
✔ Use 4 hex bolts—tighten in sequence to 18.5 ±2.5 lb-ft, then apply 90° + 15° ±5° rotation using angular gauge
✔ Ensure unloader valve is correctly seated and functions freely
✔ Inspect mating surfaces for clean and damage-free sealing
✔ Replace gaskets and O-rings during installation for leak prevention
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Warranty Information
