DANA SPICER Torque-Hub FBH04 Wet Series, Service Manual

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Installation, Maintenance and Spare Parts Instructions
Model: Standard ‘C’ Mount (FBH04…..W) Series
Spring Applied, Hydraulically-Released Multiple Plate Brake for Wet Operation.
PRE-INSTALLATlON CHECKS.
Mechanical.
Check, that in the process of unpacking the brake and
subsequent handling prior to assembly, the mounting
features and other parts of the brake are undamaged.
Ensure that the shafts to which the brake is mounted
are clean and free from burrs and swellings.
Hydraulic/Mechanical.
To check brake release, connect an appropriate
hydraulic pressure supply set to the required level up to
a maximum of 3000 psi (200 bar) and check that brake
shaft (1) is free to rotate.
Remove hydraulic supply from brake, checking to
ensure that the friction plates (3 & 6) have engaged
thus preventing rotation of brake shaft (1).
Important , release pressure during bench testing
should be limited to 2000 psi (138 bar) unless brake is
fully installed using 4-off ½" UNC mounting bolts in the
through (mounting) holes.

Brake shaft (item 1) varies with brake model
number according to spline interface.
CHB-1004 is used with FBH044444..W

Quantity of compression springs (items 22 & 23)
will vary, depending upon the brake model used.
(see chart on sheet 4 for further information).
Items marked thus are recommended spares.
Item 5 is an accessory kit supplied with each
brake.
See over for Maintenance Instructions
Item Part No. Description Qty

1
CHB-1004
Brake Shaft 1
2 CHB-1305 Housing 1
3
CHB-1901 Inner Friction Plate 6
4
CHB-1401 Pressure Plate 1
5
900506 Gasket 2
6
CHB-1601 Outer Plate 6
7
CHB-1501 Gasket 1
8 CHB-1104 Cylinder 1
9 CHB-1203 Piston 1
10 SO01904 Deep Groove Ball Bearing 1
11 SO01101 Internal Retaining Ring 1
11A SO01303 External Retaining Ring 1
12 SO01530 Rotary Shaft Seal 1
13 SO08010 Socket Head Cap Screw 4
14 SO09318 Shakeproof Washer 4
15 SO01439
‘O’ Ring
1
16 SO02414 Backing Ring 1
17 SO01687
‘O’ Ring
1
18 SO01688 Backing Ring 1
19 SO09546 Dowel Pin 2
20 SO09015 Hexagon Plug 1
21 SO09523 Plastic Plug 1
21A SO09471 Socket Pressure Plug 2
22 CHB-1701 Outer Spring

23 CHB-1702 Inner Spring
