Repair - Bosch Rexroth Hagglunds DUc MS2 Installation & Maintenance Manual

76/88 Hägglunds DUc Drive unit | Maintenance and repair
Bosch Rexroth AB, Version 06.2020, RE 15326-WA
4. Stopping the drive system. Final shut down is carried out as any normal drive
stop only with the exemption that before the pump is stopped, in idling mode,
the cooling water supply is cut. With this sequence, any risk for cooling water
to entrain the oil through the cooler is avoided due to the higher pressure in oil
circuit.Immediately after that the hydraulic pump has come to the final stop all
ball valves installed in the hydraulic main loop shall be closed to avoid any risk
for the oil to drain back to the tank. Similar the pump suction line/s also shall
be closed.
5. Check of water in oil. To check status of cooler water leakage, drain some
quantity of oil from the tank bottom using the drain cock valve located at tank
front. If any water or milk similar oil drain from the tank, it is necessary to
locate the leak and correct before next start. If such quantities of water are
found, change of oil may also be required.
Take an oil sample to check the condition of the oil, see part 9.4
6. Change of filters. The hydraulic drive is equipped with different filters for
hydraulic oil and air breathing of tank. None of these filters are cleanable and
has to be changed, see 9.3 and 9.5 In conjunction with changing drain line filter,
inspection of the same can be used to monitor status on pumps and motors. If
the filter surface shows high quantity of wear debris, the reason for this shall
be located and corrected. If the debris appears grey, the hydraulic motor wears
extensively. Yellow or bronze debris indicates wear in the hydraulic pump.
7. Cleaning of coolers. Clean the coolers acc to part 9.7
8. Electric motor lubrication Lubricate acc to 9.6.1
Re-commissioning
Before the plant is re-started after a long stop period, a check must be done to
verify the system function.
Meassures to be done:
• Remove preservative fluid and any signs of contamination.
• Follow the procedure in 8.4: Initial start up procedure.

9.9 Repair

Bosch Rexroth offers a comprehensive range of services for the repair of Hägglunds
products.
Repairs on the Hägglunds products may only be performed by service centers
certified by Bosch Rexroth.
▶ Use exclusively original spare parts from Bosch Rexroth to repair the Hägglunds
product, otherwise the functional reliability of the product can not be assured
and you lose your warranty entitlement.
In the event of questions regarding repairs, contact your responsible Bosch
Rexroth
service partner or the service department of the manufacture's plant for the
Hägglunds product, see chapter 9.10: Spare parts