Production
Housing P/N On
Production
Brackets Welded
Spicer
®
Axles & Brakes
P/N: SHAIS132
DS404 Housing Cover Weld Reinforcing Instructions
Subject of Instruction Sheet: The procedure below has been created to assist a mechanical technician in the proper
repair of a cracked rear cover weld and the installation of a reinforcement bracket on DS404 housings in Peterbilt vehicles
using an Air Leaf Suspension. This is the only approved method for this repair. Any other method of repair may result in
damage to the axle, axle housing, or other vehicle components and could affect performance and safety. Failure to follow
all steps of this procedure will result in a poor repair and the crack could occur again.
Affected Models: DS404 Drive Housing Used in Peterbilt Air Leaf Suspension Vehicles. See chart below.
Wall
Axle Model
DS404 3/8" (9.5mm) Air Leaf - Before 3/99 319402 Peterbilt
DS404 3/8" (9.5mm) Air Leaf - From 3/99 - 6/00 319954 Dana
Thickness
Reinforcing Bracket Part Number 302527
Suspension Type and
Timing
Tag
By:
Welding Equipment and Specifications:
Mig (wire) Welding
Welding Gas – recommended – 80% Argon, 20% C-O2 Gas Flow Setting – 50-60 cfh.
Wire Size – ER70S-3 or ER70S-6 .035”
First and second passes cover weld, approximate settings – 30 volts, 180 amps.
Third filler pass, cover weld, approximate settings – 26 volts, 140 amps.
Apply three weld passes to the cover and two to the bracket. The first pass should be centered over the fit-up line and
penetrate the failure area. The second pass should be placed slightly above the first. Blend the weld smoothly ( without
significant cross section enlargement ) with the housing and first pass. The third pass should penetrate the lower half of
the second pass to the edge of the housing cover. Avoid any significant overlap of weld or undercut. When making the
second and third passes the weld direction should be reversed. Always start the weld at one end, never in the middle the
intended weld area. See illustrations below for more information.
Arc (stick) Welding
Miller DC type stick welder set at 140 -150 amp setting.
Use E7018 1/8 inch Electrode for all three passes. Note** Remove slag between passes. E7018 rod must be stored in
heated rod oven. Apply three weld passes to the cover and two to the bracket. The first pass should be centered over the
fit-up line and penetrate the failure area. The second pass should be placed slightly above the first. Blend the weld
smoothly ( without significant cross section enlargement ) with the housing and first pass. The third pass should penetrate
the lower half of the second pass to the edge of the housing cover. Avoid any significant overlap of weld or undercut.
When making the second and third passes the weld direction should be reversed. Always start the weld at one end, never
in the middle the intended weld area. See illustrations below for more information. When welding the second and third
passes, reverse the direction of the weld. Never start or stop a weld close to the 12:00 position.
When using an Arc welder you may have to start the weld at the 11:00 position so that you do not run out of electrode at
12:00 Position
the 12:00 position. You can then go back and fill in the ends of the weld area.
Second Pass Direction
First Pass Direction
First Electrode
Weld Direction
Never Start or Stop at 12:00
Repair Instructions:
Important : Before starting, always wear the proper safety equipment for your protection.
1. Disconnect the battery grounds and oil temperature sensor wire. Caution*** If the battery ground is not
disconnected, vehicle electronic control modules may be damaged.
2. Block front and back of steer axle tires.
3. Jack-up driver’s side forward rear drive axle and support with jack stand.
4. Remove driver’s side forward rear drive axle tires and rims only.
5. Remove inter axle driveline.
6. Disconnect and remove tracking rod assembly.
7. For the repair of the cover weld crack, locate the ends of the crack, mark 2 inches either side of the crack. These
marks are ONLY for reference! You must grind until the entire crack is eliminated
inches on either side of the crack.
. Then grind an additional two-
Locate Crack Mark 2” Both Sides of Crack
8. If the cover weld is NOT cracked on the outside of the weld, mark the housing 2 inches either side of the 12:00
Grind Profile
Fit-Up Line
Cover
1/4”
Area To Be
position. Remember these cracks start on the inside of the housing and work their way out. You will need to grind
through the old weld to the fit-up line, this is where the cover meets the axle housing. You should have approximately
¼” of distance between the top of the cover to the bottom of the ground area. The blue dotted lines below represent
the area to be ground.
Housing
Old Weld
Ground
Radius
Cover
12:00 Position
No Crack Outside Of Weld
9. Use a 4 inch angle grinder to grind away the crack. You must grind just below the old weld, down to the fit-up line.
Use the drawing above and the photo below as a guide. It’s very important that you recognize the difference between
the crack and the point where the cover meets the axle housing. Caution*** Be careful to not break completely
through as this will contaminate the axle’s lubricant with grinding material.
Use a wire wheel to remove paint from area to be welded.
Approximate
1/4”
Grind Away Crack Side view of Grind
10. For All Weld Passes Cover Weld – When using a Mig Welder use approximate setting of 30 volts and 180 amps. If
using an Arc welder, use E7018 1/8 inch electrode.
Important** The ground from the welder must be connected to the torque rod bracket. See figure below.
Ground Connection
11. Important: The first weld pass must be centered over the fit-up line and penetrate the failed area. Remove all
Top of Repair
Top of Bracket
First Weld Pass
Cover
Housing
slag. The first pass must cool before the second pass can be applied. While weld is cooling move to step 12 to
prepare housing for bracket.
(Centered over
fit-up line)
First Pass
12. Before the reinforcing bracket is located the housing surface must be clean and paint removed in weld area.
Remove Paint From Housing Remove Paint From Bracket
13. Position the reinforcing bracket so that the bracket edge is flush with the surface between the tracking arm bracket
lugs.
Bracket Lugs
Bracket
Align Top Of Repair Bracket Align Bottom Of Bracket
Between Lugs
Cover
Housing
Second Weld Pass
14. Tack weld at housing and bracket interface.
Two At Bottom Two At Top
15. Second Pass Cover Weld – Remember, do not start or stop at the 12:00 position. The second pass will be placed
slightly above the initial pass. See drawing below. When making the second pass the weld direction should be
reversed. When using an Arc welder you may have to start the weld at the 1:00 position so that you do not run out of
electrode at the 12:00 position. You can then go back and fill in the ends of the weld area. When the second pass
cools, apply the third weld pass as show on the diagram below.
Second Pass Cover
16. Third Pass Cover Weld – The third pass should cover the lower half of the second pass and stop at the housing
covers edge. Again, reverse the direction of the weld. Remember, do not start or stop at the 12:00 position.
Housing
Third Pass Cover
Third Weld Pass
Cover
17. Bracket Weld – Weld first pass, apply second or third passes as needed. When using a Mig Welder use approximate
setting of 30 volts and 180 amps. If using an Arc welder, use 1/8 inch, E7018 electrode.
Weld First Pass, Bottom of Bracket First Pass, Top Of Bracket
18. Clean and paint the repaired area.
Clean And Paint
19. Reinstall the torque rod, use same spacers.
Install Torque Rod Bracket
20. Reinstall inter axle driveline.
21. Reinstall tires and rims.
Reconnect grounds and oil temperature wire.
22.
If you have any questions about this procedure call the Spicer C
all Center at 1-800-621-8084.
For spec’ing or service assistance, call 1-800-621-8084 24 hours a day, 7 days a week.
Or visit our web site at: http://www.spicerparts.com
SHAIS132 Copyright Dana Corporation, 2001 Commercial Vehicle Axle Division
August 2001 All Rights Reserved. P.O. Box 321
Printed in U.S.A. www.dana.com Toledo, Ohio 43697-0321
Dana Corporation
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