Forklift Brake Master Cylinder & Wheel Cylinder Selection Guide
Compare bore, stroke, mounting, pushrod and hydraulic connections—not only the casting shape. A master cylinder and a wheel cylinder perform different jobs and require different identification.
22673-72041-L left wheel-cylinder reference. Confirm side, bore, ports and installation before ordering.
A master-cylinder reference is the first identifier
1N63-516000-00 is an existing Hangcha master-cylinder reference. Its bore, pushrod length, mounting dimensions and port thread are not measured from this photograph.
Packaging reference only; not an interface or dimension photograph.
Master cylinder, wheel cylinder or assisted unit?
Establish the cylinder’s job, internal bore and mounting arrangement before narrowing the replacement. Next compare stroke, pushrod or shoe-actuation ends, port thread, sealing seat and fluid-compatible design. Keep the final acceptance tied to the installed side and port/bleeder direction, the truck’s brake or axle identity and any documented cross-reference—not the casting outline.
| Cylinder type | Bore / actuation | Mounting and linkage | Hydraulic connections |
|---|---|---|---|
| Master cylinder | Exact internal bore and effective stroke | Hole centres, pilot, pushrod length, end/clevis and attachment | Outlet count, thread and seat, reservoir arrangement and fluid-compatible design |
| Wheel cylinder | Exact bore and shoe-actuation ends | Backing-plate geometry, mounting and installed side | Inlet and bleeder position/thread; left/right if specified |
| Assisted / boosted master unit | Full assembly configuration and actuator relationship | Complete assembly mounting and linkage | Separate circuit/fluid requirements where relevant |
Why a catalogue drawing is more useful than a body measurement
ZF MICO’s off-highway range includes master, slave and wheel cylinders. Its technical selection separates bore, effective stroke, fluid type, pushrod, mounting and port configuration. These are matching fields, not dimensions that can be assigned to every forklift cylinder.
Bore is the internal piston diameter—not the outside casting diameter. Mounting-hole centres, overall length and pushrod length have different endpoints. Obtain a drawing or qualified-service record rather than dismantling a brake cylinder to prepare an inquiry.
Left and right are not interchangeable descriptions
22673-72041-L is the existing HELI left wheel-cylinder reference. Keep the suffix and installed side. No interchangeable right-hand reference is inferred.
Existing left-side reference; bore, threads and serial applicability need confirmation.
Similar casting, different brake operation
| Compare | Reason |
|---|---|
| Bore and stroke | Different dimensions can change hydraulic displacement and actuation |
| Pushrod end and length | Linkage geometry and attachment must agree |
| Thread and sealing seat | A similar thread does not establish the correct hydraulic seal |
| Fluid-compatible design | Seal and system-fluid requirements must match the manufacturer specification |
| Inlet / bleeder orientation | Position and installed side affect the correct assembly |
| Cross-reference evidence | A different number stays unverified until a documented relationship is established |
Send identification, not a long questionnaire
The old reference, truck model/serial and clear cylinder photos are enough to begin. If available, add axle/brake identity, installed side and a drawing or measured mounting/port details. Unknown bore or stroke may remain to confirm.
For close-ups, show the label, each port and sealing face, mounting holes and pushrod ends. Do not operate a truck with unresolved braking faults or open the hydraulic circuit for an inquiry.
Ask about the part you need
A part number is optional. Send it if you have it, or choose the identification route that fits your information. No technical field below is required.
Related parts and selection information
Technical references
Manufacturer examples are not confirmed Authpart stock or vehicle fitment. Check the current documentation for the exact model and revision.