Check The Specific Gravity Of The Engine Coolant - Gm Models - Genie GS-3384 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-23
Check the Specific Gravity of the
Engine Coolant - GM Models
Engine specifications require that
this procedure be performed every
400 hours of operation.
The quality of the engine coolant which is used can
have a great effect on the efficiency and life of the
cooling system. Old or dirty engine coolant may
cause the engine to perform poorly and continued
use may cause engine damage.
Burn hazard. Beware of hot
engine parts and coolant. Contact
with hot engine parts and/or
coolant may cause severe burns.
Perform this procedure with the
engine off.
1 Operate the engine until it is warm enough to
open the thermostat. Continue to run the engine
until the coolant has circulated through the
cooling system.
2 Stop the engine.
3 Allow the engine to cool until the temperature of
the coolant is below 140°F / 60°C.
Burn hazard. Beware of hot
coolant. Contact with hot coolant
may cause severe burns.
3 - 36
4 Release the latches on the engine tray and fully
slide the engine tray out.
5 Insert a 6 inch / 15 cm screwdriver or rod into
the engine tray lock hole, located near the
engine tray roller wheels, to prevent the engine
tray from moving.
6 Slowly remove the radiator cap and inspect the
cap for wear. Replace as necessary.
Burn hazard. Allow any pressure
to dissipate gradually before
removing the radiator cap.
7 Drain some coolant from the cooling system
into a suitable container.
8 Use a coolant hydrometer to check the
temperature and specific gravity of the coolant.
9 Adjust the strength of the coolant as necessary
for your climate.
10 Install the radiator cap.
11 Inspect the hoses and clamps. Replace as
necessary.
12 Clean up any coolant that may have spilled
during this procedure.
GS-3384
September 2005
REV D
Part No. 82259