Figure 5-2. Welding Repair of Fork Assembly

Figure 5-2. Welding Repair of Fork Assembly

in hermetically sealed containers, and must have

and preparation instruction herein applies also to

s t o r a g e care normal to their type. If containers

MIG or TIG welding.

have been opened for electrodes to become

5-19. PREPARATION.

exposed to normal (and above) atmospheric

humidity, the electrodes should be oven baked at

700 F. for 1 hour, minimum.

a. In natural ambient temperatures of 60 F. or

less, the machine (or component) should be "room

d. L.H. electrodes which have been in water

soaked" o v e r n i g h t i n 7 0 F . ( + ) t o e q u a t e a

should be scrapped.

preheat. If this is impossible, the weld zone (area

6" to 10" each side) should be preheated to a

l00oF. before welding. This

e. Remove only enough electrodes from the

minimum of

container to perform the immediate job. Open

m i n i m u m temperature should be maintained on

containers should be stored in heated storage

the heat zone of each joint until that joint is

containers held at 200 to 300 F.

completed.

f. Clark Equipment employs little or no TIG

b. Repair of forks, hangers and guides require a

production welding at the Industrial Truck

preheat of 150 to 250F. Thermal sticks may be

Division (ITD).

used to check these weld heat-affected zones.

Tempil sticks are available from welding suppliers

i n 50 increments from l00 o F. through 2200 F.

g. Clark Equipment (ITD) employs MIG welding

extensively in production welding. Due to its

Welding repair of fork proper is not recommended.

n a t u r e however, the welding instruction herein

( r e p a i r , as opposed to production welding) will

c . All cracks in the damaged area, or in areas

deal only with stick electrodes. The precautionary

listed in paragraph 5-14 above, must be

5-8