General Information - Repair Instruction1-103.Precautions for Use of Jack and Safety Stand
(1)always use the wheel stoppers when performing servicing on
level ground.
(2)use safety stand and rubber support as shown in the illustration.
(3)use the jack and safety stand to support specified location.
(4)When jacking up the front wheels of the vehicle, release the
park brake and place stoppers only behind the rear wheels. When
jacking up the rear wheels, place stoppers only before the front wheels.
(5)During the job, make sure to use safety stand instead of jack
only to support the vehicle.
(6)When only jacking up the front wheels or rear wheels, place
stoppers before or after the wheels touching the ground.
(7)when lowering the vehicle with its front wheels lifted, release
the park brake, and place the stopper only before the rear wheels.
When lowering the vehicle with its rear wheels lifted, place the stop-
per only after the front wheels. the opening of the removed inlet system parts and the engine with a
clean shop lag or gum tape.
(3)When installing the inlet system parts, check that there is no
mixing of a metal scrap.
5. Handling of Hose Clamp
(1)Before removing the hose, check the clamp position to re-tighten
it for sure.
(2)Replace a deformed or dented clamp with a new one.
(3)In case of reusing the hose, install the clamp on the hose where
it has a clamp track.
(4)For a steel band circlip, make it adjust by adding force to the
arrow mark direction after the installation.II. Vehicle Lift and Support Location1. Vehicle Conditions To Be Under Attention During Lift
(1)Generally speaking, when being lifted, the vehicle should be empty, do not lift the heavily loaded vehicles.
(2)When removing heavy parts such as engine and transmission, the center of gravity of the vehicle will move.
Place balance weight to prevent the vehicle from rolling or use special jack to support the vehicle.
2. Precautions for Use of Four-tappet Lift
(1)follow the safe operation instruction described in this manual.
(2)do not damage the tire or rim.
(3)use wheel stopper to retain the vehicle.Rubber SuportSteel Band Circlip
Clamp Trace
(f). Flatten the edge with hammer or sizing block, and remove the burr with file to make sure that it is aligned
with the both side alternative plates with a clearance not more than 1mm;
(g). Replace the plate, and clamp it with pincers. Carry out the spot welding along the seam at a space of
approximately 50mm;
(h). Make the welding from the center to both sides alternately block by block. Which can reduce the
deformation;
(i). Strike the welding line with the hammer or sizing block to remove the retaining stress. Polish the welding
lien wit the file or manual grinding wheel to make it even and smooth for the painting.
c. Repair for Accidented Damage
(a). Plate work flattening
When the accidented damage occurs on the plate work of the body, it can be repaired by means of beating.
In the repair process, start from Point C as shown in Fig. 5-26. Put the sizing block on the convex point, and beat
it with the hammer and change the block's position correspondingly. When the convex point is flattened, the
concaved part in Point B will rise. Similar wit the original profile of the plate, for the remaining dent, a sizing block
with the same radian can be employed. Press the bottom of the plate with hand, and beat the high point of the dent
with the hammer. (Fig. 5-27)Fig. 5-27 Plate Work Flattening (II)
A. Hammer B. Plate work
C. Sizing block Fig. 5-26 Plate Work Flattening (I)
A. Impact point B. Concaved point after impact
C. Convex point after impactFig. 5-28 Heating & Planishing
Convex Point
1. Heating pointBody Repair -Repair After Body Damage7-19 In the beating process, beat the work piece heavily at the beginning and lightly at the end. Attention shall
be paid to reduce the number of beating as possible as it can. Don't beat the same points repeatedly to prevent the
metal plate extending locally, which can complicate the repair work.
For the larger arc concave, a sizing block can be used under the center of the concave. The area of the sizing
block shall be a little larger. Jack the concaved plate up with a supporting tool. Sometime, heat the concaved part
to wine color to reduce the force. When jacking the plate up, a little excess is acceptable. (Fig. 5-28)
(b) Thermal contraction
When the concave is jacked up, if the plate extends seriously and the area is large, the thermal contraction
method can be used in case that the traditional methods don't work. (Fig. 5-29)
Heat the work piece to cerise color with oxyacetylene flame. The heating scope depends on the degree of extension.
If the extension is serious or the area is large, the heating point shall be larger relatively (diameter: approx.20-
30mm). If the extension is not serious or the area is small, the heating point shall be a little smaller (diameter:
approx.10-15mm). After the heating, beat the heating point immediately. In the beating process, a proper sizing
block is used under the plate. After it is cooled down, beat it lightly with the hammer.
The contraction starts from the highest point to the center, and then to the edge. Heat and flatten the extended
part repeatedly till the plate is flattened fully. If the convex part is too high, compress it to one half of the original
height. After it is cooled down, heat it at the original heating point till the other half of convex part is removed.
