Specifications

ManualsBrandsElectrIQ ManualsAir ConditionerAIRFLEX 15

Do not use compressed air to blow dust

accumulations out of the backing plates.

Although the friction material does not con-

tain asbestos, the dust created as the friction

material wears, along with the dust from the

operating environment, may irritate the respi-

ratory system.

4.1.1.3 Air Control Components - Check for proper adjust-

ment of the air control components. Make sure the

safety pressure switches, if used are set correctly.

Repair any air leaks as discovered.

4.1.2 Partial or complete disassembly is required to inspect

the following items:

4.1.2.1 Drum Diameter Wear - Check the O.D. of the drum

and compare to the values shown on Table 6. Minor

heat-checking may be removed by machining the

drum O.D. If the drum has been subjected to exces-

sive heat, the open end may flare out, giving the

impression that the drum has not worn. It is therefore

important to check the diameter at several locations

across the face.

Example: 16VC600 - Original Drum Diameter = 16.00 inches

(406 mm).

Minimum allowable drum diameter is:

16 inch (406 mm) - 0.09 inch (2 mm) = 15.91inch (404 mm).

Operation of the clutch or brake on a drum that

has worn or has been machined to less that

minimum allowable diameter will result in dam-

age to the element components.

4.1.2.2 Air Actuating Tube - Check that the tube has not

been damaged by excessive heat. If any portion of the

tube is hard or charred, the tube must be replaced.

Check for any blisters, which would indicate ply sepa-

ration. A tube in this condition must also be replaced.

4.1.2.3 Friction Shoe Lining Wear - If the linings are glazed,

they may be lightly sanded to remove the glazing

PROVlDlNG THEY DO NOT CONTAlN ASBESTOS.

Clean the edge of the lining and note the

presence of a blue stripe and a white stripe

along with brass flakes in the friction mate-

rial. If the above exists, the linings contain

asbestos. Using the appropriate precautions

for working with asbestos, remove the linings

and dispose of properly. DO NOT ATTEMPT

TO SAND FRICTION MATERIAL CONTAINING

ASBESTOS.

When working with any friction material,

regardless of whether or not it contains

asbestos, always wear approved safety

equipment.

4.1.2.4 Uneven Friction Lining Wear - Tapered wear across

the friction surface typically indicates a worn drum

and/or misalignment. If two or more adjacent shoes

are worn on one end only, the air actuating tube has

most likely developed a ply separation at that location.

4.1.2.5 Backing Plate Wear - Wear on the ends of the back-

ing plates from bearing against the side plates is indic-

ative of misalignment or thrusting. If wear is on one

end only, and uniform for all backing plates, a worn

drum may be causing the shoes to thrust as the ele-

ment engages. If wear exists on both ends of all of the

backing plates, excessive misalignment is probably

the cause. Slight notching in the torque bar cavity is

normal; however, if the notching occurs in a short

amount of time, check shaft alignment. If both walls in

the torque bar cavity are notched, there may be a sig-

nificant vibration (torsional) problem.

TABLE 6

DRUM WEAR LIMITS

NARROW SERIES

Element Size

Minimum Allowable wear

on Drum Diameter* inch

(mm)

11.5VC500 thru 16VC600 0.09 (2)

20VC600 thru 24VC650 0.12 (3)

28VC650 0.19 (5)

33VC656 thru 42VC650 0.19 (5)

WIDE SERIES

12VC1000 thru 16VC1000 0.09 (2)

20VC1000 thru 24VC1000 0.13 (3)

28VC1000 0.19 (5)

32VC1000 thru 38VC1200 0.19 (5)

42VC1200 thru 46VC1200 0.25 (6)

52VC1200 thru 76VC2000 0.25 (6)

*Note: The number preceding the letters ‘VC” in the ele-

ment size designates the original drum diameter in inches.