SkyTrak 6036 Service Manual - Manual (Page 140)

Engine
7-4 6036, 6042, 8042, 10042, 10054
7.4 ENGINE COOLING SYSTEM
7.4.1 Coolant System Pressure Cap
If equipped for ULS, the surge tank cap is designed to
use a 17 psi (120 kPa) cap.
If equipped for LS, the radiator cap is designed to use
13 psi (90 kPa) cap.
An incorrect or malfunctioning cap can result in the loss
of coolant and a hot-running engine.
7.4.2 Radiator/Oil Cooler and Replacement
Before considering radiator or oil cooler replacement
for other than obvious damage, conduct a cooling
system pressure test, check coolant specific gravity,
coolant level, fan belt tension and dash panel
temperature indicator.
• If engine runs hot, check temperature of upper
radiator hose.
• If hose is not hot, thermostat may be stuck in
closed position.
• If engine has overheated, performance may
suffer, indicating other damage including a leaking
cylinder head gasket, cracked cylinder head or
block, and/or other internal engine damage.
a. Radiator/Oil Cooler Removal
1. Park machine on a firm, level surface, level machine,
fully retract the boom, lower boom, place travel select
lever in the (N) NEUTRAL position, engage parking
brake, and shut engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the side and rear engine doors. Allow the
system fluids to cool.
4. Disconnect the battery positive (+) and negative (-)
cables from the appropriate battery terminals.
Remove the battery or batteries.
5. If equipped for ULS, slowly turn surge tank cap (1)
to first stop and allow any pressure to escape.
Remove surge tank cap.
6. If equipped for LS, slowly turn radiator cap (1) to
first stop and allow any pressure to escape. Remove
the radiator cap
7. Place a suitable container beneath radiator drain.
8. Place a funnel at base of radiator to channel drained
coolant into a container. Loosen drain petcock and
slowly allow coolant to drain. Transfer coolant into a
properly labeled container. Dispose of properly if
coolant needs to be replaced. Tighten the radiator
drain petcock.
9. If equipped for ULS, label and disconnect all hoses
and tubes attached to radiator (2), charge air
cooler(3), oil cooler (4), and fuel cooler (5). Remove
surge tank(6).
MAQ0500
1
5
2
4
4
3
6
IF EQUIPPED FOR ULS
MAQ0470
4
3
1
2
IF EQUIPPED FOR LS