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Hägglunds DUc Drive unit
| Scope of delivery
Bosch Rexroth AB, Version 06.2020, RE 15326-WA
5.6 Cooling water
The cooling system with water-oil plate cooler is primarily designed to operate with
clean fresh water.
When there are particles in the water, larger than 0,5 mm (0,02“), a water filter has
to be used.
For heavy contaminated water a water-oil tube cooler should be used.
Table 5: Water connection
European version
American version
bar
PSI
bar
PSI
Recommended water pressure over cooler
3.5
51
Not specified
Max allowed water pressure
16
232
10
150
Stainless steel water pipes are recommended to avoid corrosion. If other material is
used, galvanic isolation is required between the stainless steel connections and
water piping.
If the Drive Unit is equipped with rubber feets, flexible hoses are recommended
between water connections and water piping.
It is important to:
•
Maintain the water filter (if any) in a correct way to get the required flow of water
through the water-oil cooler.
• Check the temperature in the hydraulic system regulary.
• Clean the cooling system if the temperature in the hydraulic system is above the
specified limits on account of too low cooling capacity.
• Clean and empty the cooling system (water side) before periods of rest
(especially if the cooling water is not totally clean).
NOTICE
Cooling capacity too low
The service life of hydraulic motor, the main components in Drive Unit and the
hydraulic fluid will be reduced.
▶ Have the required flow, pressure and temperature of the cooling water (see
order specific Hägglunds DUc documentation).
