BENDIX TCH-008-030 User Manual

Technical Bulletin

Bulletin No: TCH-008-030-A Effective Date: 4/12/99 Cancels: N/A Page: 1 of 3

Subject:

This is to announce the availability of a new, upgraded maintenance kit for the AD-9 air dryer. The new kit,
5005037, replaces the obsolete 5004336 kit.

The change in the kit brings the purge valve up to new design standards. An optimized seal design increases the
air dryer’s resistance to freeze-ups and reduces mechanical sticking of the purge piston. The kit’s assembly tool is
required for inserting the new purge piston.

The new kit has been in production since October 1998. Refer to Installation Instructions (BWS1065) for kits
5005037, 5005893, 107794 and 107796 when using the 5005037 AD-9 maintenance kit.

UPGRADED AD-9 MAINTENANCE KIT

Kit Contents

Kit 5004336 (Old)

Description Qty.
O-Ring 1

¼” Tapping Screw 3
¼” Lock Nut 1
O-Ring 1
Barium Grease 1
Purge Valve Complete 1
O-Ring 1
O-Ring 1
O-Ring 1
Quad-Ring 1
Purge Piston Guide 1
Piston Return Spring 1
Shoulder Bolt 1
Installation Instructions 1

Key Description Qty.

1 Shoulder Bolt 1
2 Piston Guide 1
3 ¼” Tapping Screw 3
4 ¼” Washer 3
5 Purge Valve Complete 1
6 Return Spring 1
7 Purge Piston Assembly 1
8 Quad Ring 1
9 O-Ring 1
10 O-Ring 1
11 O-Ring 1
12 Assembly Tool 1
Barium Grease (not shown) 1
Installation Instruction (not
shown) 1

Kit 5005037 (New)

Note:

• Kit 5005037 is the hard seat piston

• Kit 5005893 is the soft seat piston

Kit 5005037

(numbers correspond to chart on page 1)

12

10

8

Purge valve
housing assembly
(not included)

11

9

7

6

Wire Harness
Connector

4

3

5

2

1