MONROE BRAKES®: THE TRUSTED UNDERCAR EXPERT.


A complete line of quality brake products from Monroe, the trusted undercar expert.
The Total Solution® for today's repair professionals.
Everything you need for
a quality repair.
Meets or exceeds OE
manufacturer specifications.
Offering dependable stopping solutions for today's import and domestic vehicles.
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MONROE BRAKES®: MAP Standards of Service

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Wheel Cylinders

You are not required to replace or rebuild wheel cylinders in axle sets. However, when rebuilding or replacing a wheel cylinder due to the conditions that follow, you may suggest rebuilding or replacement of the other wheel cylinder (on the same axle) for preventive maintenance, for example, the part is close to the end of its useful life. Determine the need to rebuild or replace based upon the individual wheel cylinder conditions.

Condition Code Procedure
Attaching hardware bent B Require replacement of bent parts
Attaching hardware broken A Require repair or replacement of hardware
Attaching hardware corroded, affecting structural integrity A Require replacement of corroded parts
Attaching hardware loose A Require repair or replacement
Attaching hardware missing C Require replacement of hardware
Attaching hardware not functioning A Require repair or replacement of hardware
Bleeder port damaged (if non-repairable) A Require replacement
Bleeder screw broken off in wheel cylinder (if non-repairable) A Require replacement
Only required if the hydraulic system must be opened.
Bleeder screw plugged A Require repair or replacement
Only required if the hydraulic system must be opened.
Bleeder screw seized A Require replacement
Seized is defined as bleeder screw that cannot be removed after a practical attempt at removing. Only required if the hydraulic system must be opened.
Bore corroded (pitted) B Require replacement
Bore grooved A Require replacement
Bore oversized B Require replacement
Dust boot missing C Require replacement of dust boot
Dust boot torn A Require replacement of dust boot
Inspect for conditions related to wheel cylinder.
Leaking A Require rebuilding or replacement
Leaking is defined as a drop or more. Dampness is normal.
Loose B Require repair or replacement
Piston corroded, affecting performance B Require replacement of piston and rebuilding or replacement of wheel cylinder
Piston finish worn off B Require replacement of piston and rebuilding or replacement of wheel cylinder
Piston stuck in bore A Require replacement of wheel cylinder
Threads damaged A Require repair or replacement
Threads stripped (threads missing) A Require replacement

Legend

A Part no longer performs intended purpose
B Part does not meet a design specification (regardless of performance)
C Part is missing
1 Part is close to the end of its useful life (just above discard specifications, or weak; failure likely to occur soon, etc.)
2 To address a customer need, convenience, or request (to stiffen ride, enhance performance, eliminate noise, etc.)
3 To comply with maintenance recommended by the vehicle's Original Equipment Manufacturer (OEM)
4 Technician's recommendation based on substantial and informed experience