Temperature Control, Cleaning And Hydraulic Oil - Kalmar DRF420-60S5 Maintenance Manual

12 10 Common hydraulics – 10.6 Temperature control, cleaning and hydraulic oil
page –
D795
D797-R
D
4
M
5
2
8
1
7
˚C 3
UDRF01.04GB
10.6
Temperature control, cleaning and hydraulic
oil, function description
The hydraulic system's oil is cooled and cleaned by a separate pump
circulating the oil through cooler and filter. The cooler has a temper-
ature-controlled fan which counteracts overheating.
The temperature control consists of hydraulic oil tank, hydraulic oil
pump, hydraulic oil cooler, cooling fan, hydraulic oil filter, fine filter,
sensor hydraulic oil temperature and by-pass valve.
The hydraulic oil pump pumps oil (from the tank) that is cooled in the
hydraulic oil cooler and is cleaned by the oil filters in the tank. Some
of the oil is filtered by the fine filter. An electric cooling fan increased
the air flow through the cooler when the temperature needs to be
lowered. A by-pass valve leads the hydraulic oil past the cooler di-
rectly to the tank if the resistance through the cooler and filters be-
comes too high. The temperature sensor controls activation of fan
and temperature display on the display.
1.
2.
˚C
9
˚C
3.
4.
5.
D
6.
7.
8.
9.
6
Maintenance manual DRF 400–450
https://www.forkliftpdfmanuals.com/
Temperature control,
cleaning and hydraulic oil
Hydraulic oil pump
Cooler hydraulic system
Temperature sensor (B776)
Control unit frame rear (D797-R)
Cooling fan (M668)
Hydraulic oil filter
Fine filter
By-pass valve
Control unit KID (D795)