HEXA

GENERAL

3.2.4 GENERAL INSPECTION

1. Never inspect a component for wear or dimen-

sional check unless it is absolutely clean; a

slight smear of grease can conceal a failure.

2. When a component is to be checked dimen-

sionally against figures quoted for it, use correct

equipment

(surface plates, micrometers, dial

gauges, etc.)

in serviceable condition. Makeshift

checking equipment can be dangerous.

3. Reject a component if its dimensions are out-

side limits quoted, or if damage is apparent. A

part may, however, be refitted if its critical di-

mension is exactly limit size, and is otherwise

satisfactory.

4. Use ’Plastigauge’ for checking bearing surface

clearances. Directions for its use and a scale

giving bearing clearances in 0.0025 mm steps

are provided with it.

3.2.5 JOINTS AND JOINT FACES

1. Always use correct gaskets where they are

specified.

2. Use jointing compound only when recommend-

ed. Otherwise fit joints dry.

3. When jointing compound is used, apply in a thin

uniform film to metal surfaces; take great care

to prevent it from entering oil-ways, pipes or

blind tapped holes.

4. Remove all traces of old jointing materials prior

to reassembly. Do not use a tool which could

damage joint faces.

5. Inspect joint faces for scratches or burrs and

remove with a fine file or oil stone; do not allow

removed material or dirt to enter tapped holes

or enclosed parts.

6. Blow out any pipes, channels or crevices with

compressed air, fit new ’O’ rings or seals dis-

placed by air blast.

3.2.6 FLEXIBLE HYDRAULIC PIPES, HOSES

1. Before removing any brake or power steering

hose, clean end fittings and area surrounding

them as thoroughly as possible.

2. Obtain appropriate plugs or caps before detach-

ing hose end fittings, so that ports can be

immediately covered to exclude dirt.

3. Clean hose externally and blow through with

airline. Examine carefully for cracks, separation

of plies, security of end fittings and external

damage. Reject any hose found faulty.

4. When refitting hose, ensure that no unneces-

sary bends are introduced, and that hose is not

twisted before or during tightening of union

nuts.

5. Containers for hydraulic fluid must be kept ab-

solutely clean.

6. Do not store brake fluid in an unsealed contain-

er. It will absorb water, and fluid in this condition

would be dangerous to use due to a lowering of

its boiling point.

7. Do not allow brake fluid to be contaminated with

mineral oil, or use a container which has previ-

ously contained mineral oil.

8. Do not re-use brake fluid bleed from system.

9. Always use clean brake fluid to clean hydraulic

components.

10. Fit a cap to seal a hydraulic union and a plug to

its socket after removal to prevent ingress of

dirt.

11. Absolute cleanliness must be observed with

hydraulic components at all times.

12. After any work on hydraulic systems, inspect

carefully for leaks underneath the vehicle while

a second operator applies maximum pressure

to the brakes

(engine running)

and operates the

steering.