Operation
7218−1/A1
Winterthur Gas & Diesel Ltd.
13/ 19
5. ALM-20
The function of the ALM-20 (see Fig. 6) is to operate the 4/2-way solenoid valve and
to measure the metering pressure. The ALM-20 monitors the lubricating quills for
blockages, airlocks, a decrease of lubricating oil and operation problems.
8
13
4
5
14
13
9
10
11
12
7
4
5
1
014.537/06
014.538/06
3
6
2
PART NO :
SER. NO :
HW REV. :
PROD. DATE :
Fig. 6: Control box and ALM−20
1 Control box E41.01−E41.08 8 LED (CAN2)
2 ALM−20 9 LED (CAN1)
3 Cover 10 LED (VLV)
4 LED (pressure) 11 LED (FAIL)
5 LED (SW) 12 LED (POWER)
6 Cable connection (to lubricating pump) 13 Plug (X1 / X2)
7 Cable connections (to control) 14 Nameplate
5.1 LED Indications
The LEDs (4 and 5, see Fig. 6) show the status of the lubricating pump and the
control system. The LEDs are visible on the outer surface of the ALM-20.
Table 1: LED Indications
LED
Indication Status
LED 4 (pressure) flashes yellow Shows a satisfactory lube pulse
shows red
Shows an electrical short-circuit of the
pressure transmitter (PT3131−PT3139C)
LED 5
(SW)
flashes green Module is ready for software download
shows green Ready for operation
Note: A lube pulse is not released at each piston stroke. At part load, the lube
pulses start only after some piston strokes.
When the cover (3) is removed from the ALM-20, you can see LEDs that give more
data.
2014-09
Cylinder Lubrication
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