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1809239-14
GM TORSION BAR
UNLOADING TOOL
MST7842
CAUTION: To prevent personal injury,
• Wear eye protection that meets
ANSI Z87.1 and OSHA standards.
• Completely release pressure
before servicing the torsion bar.
The torsion bar is under pressure,
creating a potentially dangerous
situation.
CAUTION: To prevent equipment damage,
clean and lubricate the forcing screw
frequently from threads to tip.
Removal
1. Attach the Torsion Bar Unloader to the vehicle
frame rail as shown. Tighten the tool against
the torsion bar adjusting arm.
2. Loosen or remove the torsion bar adjusting
bolt while counting the number of turns
required. This helps identify the original
position of the adjusting bolt.
3. Remove
Installation
1. Attach the tool to the vehicle frame rail.
Tighten the tool against the torsion bar
adjusting arm.
2. Tighten the tool to draw the torsion bar
adjusting arm into the frame rail.
3. Tighten the torsion bar adjusting bolt using
the same number of turns recorded in Step 2
during removal.
4. Remove the tool.
5. Refer to the vehicle service manual for
the correct trim height and alignment
specifications.
Details
GM's K-35 series trucks with the heavy-duty chassis require heavy-duty tools to deal with the larger torsion
bar. The larger C-frame opening on the MST7842 accommodates the larger torsion bar on these trucks, holding
it in place while you loosen or tighten the adjusting nut.
This rugged tool is built for 2010 and older GM K-3500 series trucks with heavy-duty chassis and a larger
torsion bar. It also works on 1988 to 2003 GMC and Chevrolet 1/2-, 3/4- and 1-ton pickups; S-10 Blazer and S-15
Jimmy, 4WD pickups with 4.3L V-6 engines; 1991 to 2001 Oldsmobile Bravada.
MST7842-02
C-Frame
MST7842-01
Forcing Screw
Torsion Bar
No. MST7842
Frame Rail
Adjusting
Arm
Adjusting
Bolt
GM Torsion Bar
Unloading Tool
