JLG 723A Service Manual - Manual (Page 76)

Engine: Deutz TCD 2012
7-4 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
7.2 SAFETY INFORMATION
7.3 ENGINE SERIAL NUMBER
The Deutz TCD 2012 serial number is located on a tag on
top of the engine. Information contained in the serial
number is required in correspondence with the engine
manufacturer.
Supply the engine serial number and/or data tag
information when communicating about an engine or
engine components.
7.4 SPECIFICATIONS AND
MAINTENANCE INFORMATION
For engine, coolant and oil specifications, and
maintenance information, refer to Section 2, “General
Information and Specifications.”
Detailed engine service instructions are provided in the
following publication:
• Deutz Engine Operation Manual (P/N 31200638)
7.5 ENGINE COOLING SYSTEM
7.5.1 Radiator Pressure Cap
For a 110° C (230° F) system, use a 95 kPa (13 psi)
radiator cap. An incorrect or malfunctioning cap can
result in the loss of coolant and a hot-running engine.
7.5.2 Radiator/Oil and Charge Air Cooler
Replacement
Before considering radiator, oil or charge air cooler
replacement for other than obvious damage, conduct a
cooling system pressure test check the coolant specific
gravity, coolant level, fan belt tension and dash panel
temperature indicator.
• If the engine runs hot, check the temperature of
the upper radiator hose.
• If the hose is not hot, the thermostat may be
stuck in the closed position.
• If the 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/Charge Air Cooler Removal
1. Park the machine on a firm, level surface, fully
retract the boom, lower the boom, place the
transmission control lever in (N) NEUTRAL, engage
the park brake and shut the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Thoroughly clean the engine and surrounding area,
including all hoses and fittings before proceeding.
5. Properly disconnect the battery.
6. Slowly turn the coolant overflow bottle cap and allow
any pressure to escape. Remove the overflow bottle
cap.
7. Place a suitable container beneath the radiator
petcock.
WARNING
DO NOT service the machine without following all
safety precautions as outlined in the “Safety Practices”
section of this manual.