Description
16859-G - COUNTERSHAFT BRAKE ACTUATOR VALVE - 3-WAY, 1/8" NPT
PART NUMBER(S):
Fleet Products: 16859-G | Replaces OE: 16859, WM148A, WM148-A
DESCRIPTION:
Model: WM148A Countershaft Brake Actuator Valve
Vehicles: Heavy-duty trucks equipped with compatible Eaton Fuller manual transmission countershaft brake systems
• Valve Type: Three-way pneumatic actuator valve
• Air Ports: 1/8" NPT
• Actuation: Air-operated
• Mounting: Transmission control system mount
• Included Component: Control knob
• Application: Transmission countershaft brake control
• Function: Directs air pressure to apply and release the countershaft brake during transmission shifting
Applications:
Designed for compatible Eaton Fuller manual transmissions using a pneumatic countershaft brake. The valve controls airflow to the countershaft brake actuator to assist with transmission engagement during gear changes.
CROSS-REFERENCE(S):
111549, 1662-532-C, 16859B, 16859NP, 3088-16859, 35531059, 3623, 36230, EF36230, FUL16859, FUR-16859, GBV-3623, M1316859, S-4397, S4397, WM148, L30328
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Depressurize the transmission air circuit before removing or installing the valve.
✔ Confirm all connections use the correct 1/8" NPT fittings.
✔ Mark each air line before disconnection and reconnect it according to the transmission pneumatic schematic.
✔ Apply air-system-compatible thread sealant sparingly without allowing sealant inside the valve.
✔ Test countershaft brake application and release, shifting operation, and all connections for air leakage.
Warranty Information
