Opel Frontera UBS. Service manual — part 1927
3E – 4 WHEELS AND TIRES
TIRES
REPLACEMENT
When replacement is necessary, the original metric size
should be used. Most metric tire sizes do not have exact
corresponding alphanumeric tire sizes. It is recommended
that new tires be installed in pairs on the same axle. If
necessary to replace only one tire, it should be paired with
tire having the most tread, to equalize braking traction.
CAUTION:
Do not mix different types of tires such as radial, bias and
bias-belted tires except in emergencies, because vehicle
handling may be seriously affected and may result in loss
of control.
TIRE MOUNTING
Remove valve cap on valve stem and deflate the tire.
Then use a tire changing machine to mount or dismount
tires.
Follow the equipment manufacturer’s instruction. Do not
use hand tools or tire lever alone to change tires as they
may damage the tire beads or wheel rim.
TIRE DISMOUNTING
Rim bead seats should be cleaned with a wire brush or
coarse steel wool to remove lubricants, and light rust.
Before mounting a tire, the bead area should be well
lubricated with an approved tire lubricant.
After mounting, inflate the tire to 196 kPa (28 psi) so that
beads are completely seated. Inflate the air to specified
pressure and install valve cap to the stem
WARNING:
NEVER STAND OVER TIRE WHEN INFLATING. BEAD MAY
BREAK WHEN BEAD SNAPS OVER RIM’S SAFETY HUMP
AND CAUSE SERIOUS PERSONAL INJURY.
NEVER EXCEED 240 kPa (35 psi) PRESSURE WHEN
INFLATING. IF 240 kPa (35 psi) PRESSURE WILL NOT
SEAT BEADS, DEFLATE, RE-LUBRICATE AND RE-INFLATE.
OVER INFLATION MAY CAUSE THE BEAD TO BREAK AND
CAUSE SERIOUS PERSONAL INJURY.
TIRE REPAIR
There are many different materials on the market used to
repair tires.
Manufacturers have published detailed instructions on
how and when to repair tires. These instructions can be
obtained from the tire manufacturer if they are not
included with the repair kit.
UNIT REPAIR
WHEELS AND TIRES 3E – 5
WHEELS
REPLACEMENT
Damaged wheels and wheels with excessive runout must
be replaced.
Wheel Runout at Rim (Based on Hub bore.)
GENERAL BALANCE PROCEDURE
Deposits of mud, etc. must be cleaned from the inside of
the rim.
The tire should be inspected for the following: match
mount paint marks, bent rims, bulges, irregular tire wear,
proper wheel size and inflation pressure. Then balance
according to the equipment manufacturer’s
recommendations.
There are two types of wheel and tire balance.
Static balance is the equal distribution of weight around
the wheel.
Assemblies that are statically unbalanced cause a
bouncing action called tramp. This condition will
eventually cause uneven tire wear.
Dynamic balance is the equal distribution of weight on
each side of the wheel center-line so that when the tire
spins there is not tendency for the assembly to move from
side to side. Assemblies that are dynamically unbalanced
may cause shimmy.
WARNING:
STONES SHOULD BE REMOVED FROM THE TREAD TO
AVOID OPERATOR INJURY DURING SPIN BALANCING
AND TO OBTAIN A GOOD BALANCE.
Steel
Aluminum
A Vertical play:
Less than
mm(in)
1.5 (0.059)
0.7 (0.028)
B Horizontal play:
Less than
mm(in)
1.5 (0.059)
0.7 (0.028)
3E – 6 WHEELS AND TIRES
BALANCING WHEEL AND TIRE
ON-VEHICLE BALANCING
On-Vehicle balancing methods vary with equipment and
tool manufacturers. Be sure to follow each manufacturer’s
instructions during balancing operation.
OFF-VEHICLE BALANCING
Most electronic off-vehicle balancers are more accurate
than the on-vehicle spin balancers. They are easy to use
and give a dynamic balance. Although they do not correct
for drum or disc unbalance (as on-vehicle spin balancing
does), they are very accurate.
4A1–1
DIFFERENTIAL (FRONT)
DRIVELINE/AXLE
CONTENTS
Differential (Front)
4A1
. . . . . . . . . . . . . . . . . . . . . . .
Differential (Rear/220mm)
4A2A
. . . . . . . . . . . . . . . .
Differential (Rear/244mm)
4A2B
. . . . . . . . . . . . . . . .
Driveline Control System (Shift on the Fly)
4B1
. .
Driveline Control System (TOD)
4B2
. . . . . . . . . . .
Driveshaft System
4C
. . . . . . . . . . . . . . . . . . . . . . .
Transfer Case (Standard Type)
4D1
. . . . . . . . . . .
Transfer Case (TOD)
4D2
. . . . . . . . . . . . . . . . . . . .
DIFFERENTIAL (FRONT)
CONTENTS
Service Precaution
4A1–1
. . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle
4A1–2
. . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis
4A1–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pinion Shaft Oil Seal
4A1–3
. . . . . . . . . . . . . . . . . . . . .
Pinion Shaft Oil Seal and Associated Parts
4A1–3
Removal
4A1–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
4A1–4
. . . . . . . . . . . . . . . . . .
Installation
4A1–4
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle Assembly
4A1–5
. . . . . . . . . . . . . . .
Front Drive Axle Assembly and
Associated Parts
4A1–5
. . . . . . . . . . . . . . . . . . . . . .
Removal
4A1–5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
4A1–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Assembly
4A1–9
. . . . . . . . . . . . . . . . . . . .
Disassembled View
4A1–9
. . . . . . . . . . . . . . . . . . . .
Disassembly
4A1–10
. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly
4A1–12
. . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Cage Assembly
4A1–21
. . . . . . . . . . . . . . .
Disassembled View
4A1–21
. . . . . . . . . . . . . . . . . . . .
Disassembly
4A1–21
. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
4A1–22
. . . . . . . . . . . . . . . . . .
Reassembly
4A1–23
. . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications
4A1–25
. . . . . . . . . . .
Special Tools
4A1–28
. . . . . . . . . . . . . . . . . . . . . . . . . .
Service Precaution
WARNING: IF SO EQUIPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE REFORMING SERVICE ON
OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED , do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally,such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specification. Following these
instructions can help you avoid damage to parts and
systems.
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