L23/30H
V28/32S
Operation
1)Open the indicator valve and blow through shortly.
2)Connect the max pressure indicator to the indicator valve and open the valve.
3)After 3-5 seconds read the max. pressure on the gauge.
Attention: The indicator valve has to be open while reading the max. pressure on the gauge. The measuring period should not exceed 30 seconds.
4)Close the indicator valve and open the valve screw (5), fig 1.
5)Disconnect the max. pressure indicator and close the valve screw (5), fig 1.
6)Measure the remaining cylinders by following step 1 to 5.
Overhaul Intervals
1)Dismount and clean the non-return valve after 200 measuring periods. If the pressure drop is more than 5 bar within 60 seconds (test pressure 100 bar) it is recommended to relap the non-return valve.
2)Check the pressure gauge after 1,000 measuring periods or after 12 months use.
Attention: Use only exhaust gas or nitrogen gas and never oil for testing the pressure drop and the pressure gauge. By using oil carbon will deposit inside the measuring instrument.
Dismantling and Assembly
1)Dismount the valve screw (5), fig 1.
2)Turn the screw (4) into the instrument to enable dismounting of the housing (1).
3)Loosen the screws (2) (4 pieces) for separating upper and lower part.
1
2
5
|
4 |
|
|
|
3 |
|
|
1 |
Housing |
2 |
Allen screw |
3 |
Sealing |
4 |
Screw |
5 |
Valve screw |
|
|
Fig 1 Pressure Indicator.
4)After separation of the upper and lower part, take off the non-return valve assembly.
5)Lap the valve and the valve seat.
6)Renew the sealing ring (3) and screws (2), if necessary.
7)When mounting the upper and lower part, use only original screws.
8)Coat the screws (2) with copaslip or similar and tighten to 10 Nm.
9)After assembly the instrument can be used without any new calibration.
Check of the Pressure Gauge
10)Testing of the instrument should only be made by skilled specialists, and it is recommended to send the instrument to MAN B&W Diesel A/S, Holeby for calibration.
