Day Cab Conversion Closure Panel
M-811-001
(April 2009)

Valid for
All CX cabs and later style CH cabs

Case description
A closure panel kit (reference No. 204SX403A) is available for converting a CX or CH (with CX-style cab having a
“walk-through” sleeper opening) sleeper cab to a day cab.
Note: Not applicable to Mack Trucks Australia.

Parts
Reference Number

Description

204SX403

Closure panel and reinforcement brackets

204SX404

Interior trim panel kit (available in medium warm gray
only)

204SX405

Hardware kit

204SX412

Cab suspension kit (CH & CX)

204SX419

Cab suspension kit (CHN, CXN, CHU & CXU)

20QS53M

Cab rear glass

23QS525M

Cab-to-closure panel lower gasket

23QS526M

Cab-to-closure panel upper gasket

Note: For CH model chassis, this closure panel kit (reference No. 204SX403A) is only applicable for later models
having the CX-style cab (cab base part number 1QS51122M, including all M number variations). This kit does not
apply to earlier CH sleeper chassis having cab base No. 1QS51112M. On earlier CH model chassis, the opening
through the back of the cab is keyhole shaped, whereas on later chassis, the entire back of the cab is opened (refer to
the following illustrations to determine the differences between early and late model CH cabs).
Difference Between Early and Late Model CH Cabs

Kit part Nos. 204SX403 and 204SX405 include the following components:

Panel Kit part number 204SX403 Contents
Qty.

Part number

Description

1

NSS

Closure panel assembly

2

NSS

Reinforcement brackets, left- and right-hand, upper

1

NSS

Reinforcement bracket, left-hand, lower

1

NSS

Reinforcement bracket, right-hand, lower

Hardware Kit part number 204SX405 Contents
1

335AM3

Rivnut, clearance lamp/marker lamp assemblies

4

27AM9

Bolt, closure panel-to-cab

4

271AM10

Washer, closure panel-to-cab

34

26AM14

Bolt, cab-to-closure panel

38

271AM8

Washer, cab-to-closure panel

4

29AM10

Bolt, cab-to-lower closure panel at sill

2

545-2PH265209

Spacer, B-post reinforcement

2

545-2C2239342

AVK nut, B-post reinforcement

1

16QS412AM

Seal, cab rear window

6

335AM14

AVK nuts, lower sill and B-post reinforcement

4

56MO327

Department of Transportation (DOT) reflectors

4

35AX236

Spacer, seat belt-to-floor tether

4

27AM5008

Bolt, seat belt-to-floor tether

1

3198–1010064335

Air conditioner plug, #6, with O-ring

1

3198–1010064336

Air conditioner plug, #10, with O-ring

Parts Supplied Separately, Not Part of a Kit
1

20QS53M

Window glass, cab rear

1

23QS525M

Gasket, cab-to-closure panel, lower

1

23QS526M

Gasket, cab-to-closure panel, upper

The interior trim panels are available in medium warm grey only. Parts included in the trim panel kit (part number
204SX404) are as follows:
Interior Trim Panel Kit part number 204SX404 Contents
Qty.

Part number

Description

1

3200-31C8106710M

Panel, cab rear sill

1

3200-31C8106708M

Panel, cab rear wall right-hand side

1

3200-31C8106709M

Panel, cab rear wall left-hand side

1

3200-31C8102419M

Panel, vinyl, cab rear wall lower

1

3200-31C8102429M

Panel, vinyl, cab rear wall upper

14

3200–8079378

Push fasteners, dual head, black

10

73AX121

Push fasteners, warm grey

CH & CX ONLY

When converting a sleeper chassis to a day cab, the rear cab suspension must be changed. Components necessary
for this conversion are available in the cab suspension kit (part number 204SX412). This kit includes the following:
Suspension Kit part number 204SX412 Contents
Qty.

Part number

Description

1

227QS312AM

Spring (airbag), cab rear

2

14QK391BM2

Shock absorbers

8

159AM2

Huck®-Fit collar

4

191AM2

Nut

2

20AX3

Nut

14

26AM13

Bolt

10

271AM8

Washer, fairing

2

27AM31

Bolt

2

30QS2268M

Pad

2

30QS2284M

Sleeve

4

30QS2285M

Isolator

2

30QS4224M3

Bracket

1

30QS4225M2

Bracket

1

30QS4244M

Bracket

8

4AM10M2

Huck®-Fit pin

2

71RU21613M

Spacer

1

97AX286

Snap ring

1

90AX20

Rod, cab levelling valve

1

20QE2373

Valve, cab levelling

CHN, CXN, CHU & CXU ONLY
When converting a sleeper chassis to a day cab, the rear cab suspension must be changed. Components necessary
for this conversion are available in the cab suspension kit (part number 204SX419). This kit includes the following:
Suspension Kit part number 204SX419 Contents
Qty.

Part number

Description

2

227QS47M

Spring (airbag), cab rear

2

14QK3103M

Shock absorbers

12

159AM5

Huck®-Spin collar

1

191AM2

Nut

2

20AX3

Nut

4

26AM13

Bolt

2

35AX1026

Washer

2

27AM21

Bolt

2

30QS3579M2

Bracket - Cab Mtg

1

30QS3596M

Bracket - Shock, Rear Cab Mtg LH

1

30QS3596M2

Bracket - Shock, Rear Cab Mtg RH

1

30QS4535M

Bracket - Cab, Rear LH

1

30QS4535M2

Bracket - Cab, Rear RH

2

30QS4538M

Cab Support - Rear

7

49AX283

Plasti-Plug

12

4AM34

Huck®-Spin Bolt

2

36AX1

Lock Washer

2

22AX19

Nut

1

18QK36

Valve, Link

1

30QS3599M

Cab Levelling Valve Bracket - Upper

2

37AX471

Flat Washer

1

26AM14

Screw

4

48RU2313

Band Clamp

2

14QK146

Kit

An optional map pocket is available. The following parts are required for installation of the map pocket:
Qty.

Part number

Description

1

39QR434M2

Map pocket

2

127AM5002

Screws

2

39QR435M2

Covers, screw

2

228AM3

U-nuts

3

400AX35

Screws

3

271AM5006

Washers

When converting a chassis equipped with a high-rise sleeper to a day cab, installation of clearance and marker lamps
will be necessary:
Qty.

Part number

Description

5

38MO4105M

Clearance/marker lamp assembly