Coolant Sampling - PREVOST H3-41 Maintenance Manual

A decal located on the surge tank provides
information on recommended coolants.
CAUTION
On Volvo D13 engine, use only Extended Life
Coolant (ELC). Do not add supplemental
coolant additives (SCA) to extended life
coolant. Do not use a coolant filter containing
Supplemental Coolant Additives (SCA).
Recommended coolants for Volvo D13
engine:
 Texaco CPS#227998 (pre-diluted 50/50
mixture);
 Chevron CPS#227811 (pre-diluted 50/50
mixture);
 Volvo
20358716
mixture)
The ELC coolant slow depleting additive
chemistry does not require regular testing, but
the coolant can be tested with a FleetFix®
Maintenance Test Strip (to measure nitrite and
carboxylate levels) and the FleetFix® Dilution
Test Kit (to determine contamination and
protection levels of the ELC coolant).
The freeze protection level should be checked at
least twice a year using a coolant refractometer.
CAUTION
Extended Life Coolant (ELC) will test as out of
additives (SCA), but SCA should not be
added. Shortened engine life may be the
result of adding SCA.
6.5

COOLANT SAMPLING

Providing a sample of coolant for lab analysis
may be required at some point in the life of the
vehicle.
(pre-diluted 50/50
SECTION 05A: H3 SERIES COOLING SYSTEM
WARNING
Before proceeding with the following steps,
make sure the coolant has cooled down. The
sudden release of pressure from a heated
cooling system can result in loss of coolant
and possible personal injury (scalding) from
the hot liquid. Sampling should be performed
on a cold engine.
NOTE
The following procedure is provided for
reference only. Instructions coming with the
laboratory test kit take precedence over this
procedure.
Typical material required:

Hand Vacuum Pump w/ bottle provision

Sample bottle

Plastic tube (1/4 "refrigerator" tube)

Nitrile gloves

Security glasses

Shop Towels
NOTE
Watch out for accidental contamination!
Hand vacuum pump should be used for
coolant sampling only to prevent cross-
contamination.
Also, ensure cleanliness throughout this
procedure to make sure the coolant sample is
not contaminated accidentally.
Sampling should be performed on the surge
tank, on a cold engine.
If the vehicle has been standing still for a
significant period, drive it around 30 min up to
normal operating temperature. Then let it cool
down.
1. Pull the pressure cap off the surge tank.
Refer to Figure 1 for location of cap.
PA1621 Maintenance Manual All Series | January 2017 15