2006 GREAT WALL SAFE Transfer box

TF-22
12
3 4
6
7
8
95
21
Transfer Box
Transfer Box Assembly
1. motor assembly
2. shift shaft
1. fixed sensor bracket
2. bolt
3. sensor assembly
4. velocity sensor
5. o-ring6. motor assembly
7. bolt
8. gasket
9. transfer box rear body
12. Mount the external electric shifting element (for the elec-
tric shift transfer box)
(a) Locate the motor assembly by aligning the triangle
groove on motor to the shift shaft.
(b) Move the motor to combine the shift shaft and keep it
close to the rear cover. Then run the motor clockwise
until the motor locates the correct place and the mooting
holes are aligned.
(c) Mount the O-ring on the velocity sensor and encase the
velocity sensor assembly in rear cover. A clip and three
bolts shall be mounted on the velocity sensor.
Fastening torque
(8
11)N
m
(d) Mount the bolts and gaskets on the end of motor clip.
Fastening torque
(8
11)N
m

TF-23
5 4
3
1
6 2
Transfer Box
Transfer Box Assembly
1. transfer box rear body
2. flange
3. oil seal
4. gasket
5. nut
6. oil plug
13. Flange assembly
The parts mount process is as follows:
(a) Encase the two oil plugs in the rear cover.
(b) Encase the flange, sealing ring and gasket, and then
screw up the nuts.
Fastening torque
(203
244)N
m

TF-24Transfer Box
Washing, Checking, Up-Keeping and Exchanging (Washing)
1. Washing
Notice: check the metal rag around the magnet first before washing, large granule or irregular metal
granule shows the disintegratation or similar damage. Small or fine metal granule shows the uneven
or serious wear. If the metal rag is founded, notice shall be taken on damage and wear inspection
during checking the rotating parts and the element matched with the rotating parts.
(a) Common washing
Wash the parts in cleaning agent to clean away the old lubricant and deposit. Clean away the deposit in oil hole
with brush. Take notice not to scrape the metal coupling face when washing the parts cannot be cleaned with
brush.
(b) Dry the washed parts by blowing
Dry the washed parts by blowing the low-pressure compressed air (max pressure is 137.9kPa), because cloth
thread may be left during cleaning the parts with cloth. The bearing shall be held by hand to prevent it from
rotating when blowing it.
(c) Bearing lubrication
The ball bearing and needle bearing shall be lubricated with the lubricant for transfer box after washing. As
the non-lubricated bearing may cause damage when be dry. Cover the lubricated bearing to prevent dust
entering in.
Washing, Inspection, Maintenance or Change

TF-25
(b) Normal gear grinding trace.
Transfer Box
Washing, Checking, Up-Keeping and Exchanging (Checking)
Checking
1. Common Checking process
Check all parts by visual check to see whether there is damage
or serious or uneven wear (parts needed be substituted by new
parts such as O-ring, oil seal and etc. shall be excluded).
Abandon the damaged or weary parts that will affect on their
performance. The check items are as follows:

Burr: tips protruded from the material regionally

Rag: broken small blocks or particles

Crack: surface thread showing the material is partly or
completely separated.

Excessive abrasion
Refer to the serious or obvious abra-
sion beyond of application limit.

Reduction change
Material slip caused by the heavy
pressure on part of it.

adhesive bonding
Granules of the soft metal are dis-
persed and bonded on the hard metal surface.

Ditch trance: partial crack or trough that means the material
transfer instead of material loss.

Pitting corrosion
Damages to the metal surface caused by
pressure, which are displayed due to color change caused
by heat generated by metal friction.

Step wear
a weary step may be seen or felled between the
neighboring interface or between the non-touching face
due to the excessive wear.

Uneven wear: Partially, unevenly distributed wear, which
includes holes, bright spots, uneven polishing or other
visual drawbacks.
2. Gear or Chain sprocket tooth inspection
Check the gear and chain sprocket tooth according to the
following process:
(a) Normal gear shaving trace.
normal gear shaving trace
normal gear grinding trace

TF-26Transfer Box
Washing, Checking, Up-Keeping and Exchanging (Checking)
(e) Unacceptable side deflective contact area that must be
changed.
(f) Acceptable side-deflective contact area
(g) Unacceptable side deflective contact area that must be
changed. (c) Ideal engagement contact area
(d) Acceptable side-deflective contact area

TF-27Transfer Box
Washing, Checking, Up-Keeping and Exchanging (Checking)
(h) Acceptable contact area deflecting to the tooth top.
(i) Unacceptable contact area deflecting to the tooth top,
which must be changed.
(j) Acceptable contact area deflecting to tooth root.
(k) Unacceptable contact area deflecting to tooth root, which
must be changed.
4. Key tooth inspection
Check the broken or peeled spline teeth. The spline teeth may,
if only small part is peeled off, be repaired in the same way as
that for the gear teeth, and can be reused. In case the spline
tooth is broken, the spline must be abandoned. The contact
type of spline is not the same as that for gear; however, spline
that shows step sliding must be abandoned.

TF-28Transfer Box
Washing, Checking, Up-Keeping and Exchanging (Maintenance or Change of Gear or Chain Sprocket Gear)
Maintenance or Change of Gear or Chain
Sprocket Gear
1. Maintenance principle
(a) Conduct the maintenance for the partial, small peel off
with the suitable manual high-speed grinding tool.
(b) Do not clear away the metal as can as possible when
grinding the matrix metal.
(c) All pointed angles and sides must be repaired as the slip-
pery contour line. Because the pointed angle or edges
may be peeled off again or developed into crack.
(d) Clear away the burr with the suitable grinding stone. Take
notice not to damage the matrix when clearing away the
projecting materials, and
(e) When substituting the non-repaired parts (such as
bearing), if the part is doubted in its re-application
capability, it must be changed.
2. Cases for gear or chain sprocket maintenance or substi-
tuting
(a) The gear, being peeled off at the two sides of tooth top in
contact face, may be repaired for reuse.
(b) The gear, being peeled off at the central tooth top of
contact face, may be repaired for reuse.
(c) The gear, being peeled off at one side of the non-contact
face, may be repaired for reuse.

TF-29Transfer Box
Washing, Checking, Up-Keeping and Exchanging (Maintenance or Change of Gear or Chain Sprocket Gear)
(d) The gear, being peeled off at the center of one side of
contact face, may be repaired for reuse
(e) The gear, being peeled off in the center of contact area,
shall be changed.
(f) The gear, being peeled off at two sides of tooth top, shall
be changed.