TABLE 6
Wear Limits for DBB Brake Components
Item
Description
Wear Limit
Remarks
#7
Friction Disc
Assembly
Friction Material
Fully worn at bottom of dust
groove. See Figure 6.
Friction material must also be
replaced when contaminated
with oil or grease.
Dual disc brakes have adjustment
provision. See 4.2.1.
#1
Mounting
Flange
Friction Wear
Surface
Maximum wear is .03 1in.
(.80 mm).
Wear will be in form of circular grooves on
iron surface.
#13
Pressure Plate
Friction Wear
Surface
Maximum wear is .031 in.
(.80 mm).
Wear wil be in the form of circular grooves
on iron surface.
Reaction Holes
Maximum wear is .031 in.
(.80 mm).
Wear will be in the form of elongation of the
holes. Original hole diameters are shown on
the table below.
#30
Reaction Plate
Friction Wear
Surfaces
Maximum wear (each Side)
is .031 in. (.80 mm).
Wear will be in form of circular grooves on
iron surface.
Reaction Holes
Maximum wear is .031 in.
(.80 mm).
Wear will be in the form of elongation of the
holes. Original hole diameter is 1.343"
(34.11mm) .
#12
Clamp Tube
Reaction Area
Maximum wear is .015 in.
(.38 mm).
Wear will be in the form of a notch or step
on the side of the tube.
#19
Cylinder
Seal Area
Maximum wear is .005 in.
(.13 mm).
Wear will be in the form of grooves where
the seals contact.
#22
Spring
Spring Free Height
Minimum free height is 4.25"
(108mm). Springs must be
replaced in complete sets.
Original free height is 4.44/4.56"
(113/116mm)
#34
Release
Spring
Spring Free Height
Minimum free height is 1.5"
(38.1mm)
Original free height is 1.67" (42.4mm).
#28 & #37
Gear and Ring
Gear
Gear Backlash
Maximum allowable total
backlash is .040 in.
(1.0 mm).
Replace ring gear and gear together.
If step is worn in gear, gear must be
replaced.
Figure 5
Wear
Grooves
Figure 6
Measure this gap with
brake engaged.
DBB 8104 PDF format
7
© Copyright Eaton Corp., 1998. All rights reserved.
(Revised: January, 1998)
