106 SEBU8605-01
Maintenance Section
Hoses and Clamps - Inspect/Replace
If you inspect t
he engine in operation, always use
the proper inspection procedure in order to avoid
a fluid penetration hazard. Refer to Operation and
Maintenance M
anual, “General hazard Information”.
Inspect all hoses for leaks that are caused by the
following co
nditions:
•
Cracking
•
Softness
•
Loose clamp
s
Replace hoses that are cracked or soft. Tighten any
loose clam
ps.
Check for the following conditions:
•
End fittings that are damaged or leaking
•
Outer cov
ering that is chafed or cut
•
Exposed wire that is used for reinforcement
•
Outer covering that is ballooning locally
•
Flexibl
e part of the hose that is kinked or crushed
•
Armoring that is embedded in the outer covering
A constant torque hose clamp can be used in place
of any standard hose clamp. Ensure that the constant
torque
hose clamp is the same size as the standard
clamp.
Due to
extreme temperature changes, the hose will
harden. Hardening of the hoses will cause hose
clamps to loosen. This can result in leaks. A constant
torqu
e hose clamp will help to prevent loose hose
clamps.
Each
installation application can be different. The
differences depend on the following factors:
•
Type
of hose
•
Type of fitting material
•
Anticipated expansion and contraction of the hose
•
Ant
icipated expansion and contraction of the
fittings
Replace the Hoses and the Clamps
Re
fer to the OEM information for further information
on removing and replacing fuel hoses (if equipped).
The coolant sys
tem and the hoses for the coolant
system are not usually supplied by Perkins. The
following text describes a typical method of replacing
coolant hoses
. Refer to the OEM information for
further information on the coolant system and the
hoses for the coolant system.
Pressurize
d System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components
are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
1. Stop the engine. Allow the engine to cool.
2. Loosen th
e cooling system filler cap slowly in
order to relieve any pressure. Remove the cooling
system filler cap.
Note: Drain the coolant into a suitable, clean
container. The coolant can be reused.
3. Drain the coolant from the cooling system to a
level that is below the hose that is being replaced.
4. Removethehoseclamps.
5. Discon
nect the old hose.
6. Replace the old hose with a new hose.
7. Install the hose clamps with a torque wrench.
Note:
For the correct coolant, see this Operation and
Maintenance Manual, “Fluid Recommendations”.
8. Refil
l the cooling system. Refer to the OEM
information for further information on refilling the
cooling system.
9. Clean the cooling system filler cap. Inspect the
cooling system filler cap's seals. Replace the
coo
ling system filler cap if the seals are damaged.
Install the cooling system filler cap.
10. Sta
rt the engine. Inspect the cooling system for
leaks.
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