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The BRADEN brake valve is a reliable hydraulic valve
with internal components manufactured to close toler-
ances. Because of the close tolerances and mating
of components, the valve housing, spool, piston and
check poppet are not available as replacement parts.
Before disassembling the brake valve, be sure to con-
duct all applicable troubleshooting operations and make
certain the brake valve is causing the malfunction.
Thoroughly clean the outside surfaces of the valve
and work in a clean dust free area, as cleanliness is
of utmost importance when servicing hydraulic compo-
nents.
DISASSEMBLY
1. Remove the pilot orifice from the brake release
(BR) port using a 5/32-inch Allen wrench.
2. Remove the elbow fitting, motor drain check ball
and spring.
3. Remove the spool spring retainer and spool spring.
Check spring free length. Replace spring if less
than 1-15/16 inches (49.2 mm) long.
BRAKE VALVE SERVICE
ITEM
DESCRIPTION
QTY.
1
Valve Housing (NSS)
1
2
Check Valve Retainer (NSS)
1
3
Spring Retainer (NSS)
1
4
Plug (NSS)
1
5
Spool (NSS)
1
6
Damper Piston (NSS)
1
7
O-ring
1
8
Check Valve Poppet (NSS)
1
9
Pilot Orifice
1
10
Check Valve Spring
1
11
Spool Spring
1
12
O-ring
2
13
O-ring
1
14
O-ring
1
15
Back-up Ring
1
16
Back-up Ring
1
17
Check Ball (1/4 in.)
1
18
Check Ball Spring
1
19
Elbow Fitting
1
22
Shim
A.R.
BRAKE VALVE ASSEMBLY
NSS - NOT SERVICED SEPARATELY. REPLACE
COMPLETE VALVE ASSEMBLY.
A
A
SEC. A-A
DRAIN
PORT
3
1
2
4
5
6
14
16
11
12
10
7
8
9
13
15
18
17
19
“BR”
PORT
22
