Maintenance
50940411/G0219 132 Printed in U.S.A.
NOTE: Use a low-silicate ethylene glycol-
based coolant, mixed with quality water and
supplemental coolant additives (SCAs) suitable
for heavy-duty diesel engines. See “Fluids/Lubri-
cants Types and Capacities” on page 35 and the
engine operation manual for additional informa-
tion.
Cleaning Radiator Fins
The radiator fins can become blocked during use
which will lead to reduced cooling function and
engine overheating. Clean the radiator cooling fins
after every 250 hours or 6 months of operation,
whichever occurs first.
1. Perform the “Mandatory Safety Shutdown Pro-
cedure” on page 20.
2. Wait until the engine has cooled. See
“Maintenance and Service Safety Practices” on
page 25.
3. Open the engine cover according to “Engine
Access” on page 126.
4. Clean the radiator fins by blowing air/water
through the fins from the rear of the radiator,
toward the engine.
IMPORTANT:
Use caution! High pressure can
damage radiator fins.
Draining/Refilling Cooling System
1. Park the machine on a level surface.
2. Perform the “Mandatory Safety Shutdown
Procedure” on page 20.
3. Wait until the engine has cooled. See
“Maintenance and Service Safety Practices” on
page 25.
4. Open the engine cover. See “Engine Access” on
page 126.
Do not remove radiator cap when the coolant is
hot. Serious burns may occur.
5. Slowly loosen radiator cap (P, Fig. 135) and
allow pressure to escape. Remove cap.
6. Position a suitable collection container, with a
minimum capacity of 15 L (4 gals.) underneath
the radiator.
IMPORTANT:
Dispose waste coolant according to
environmental laws. DO NOT pour coolant onto the
ground or down a drain.
7. Access radiator drain plug (X, Fig. 136) through
access hole (Y) in the frame underneath the
radiator. Using an allen wrench, remove radiator
drain plug (X) and allow the coolant to drain into
the container.
Fig. 134 – Coolant Expansion Reservoir
T
S
R
Models RT175/RT210
Fig. 135 – Radiator Cap
P
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