OPERATING INSTRUCTIONS
All Pumps fitted to Marshall Tankers, have unfortunately, to be subject to the Manufacturer’s
warranty terms which are that if a Pump has worked successfully for more than three hours
it cannot be regarded as being of faulty manufacture.
YOUR MARSHALL TANKER HAS BEEN DESIGNED TO GIVE YOU LONG &
RELIABLE SERVICE, ENSURED BY FOLLOWING THE INSTRUCTIONS BELOW.
General operating instructions:
1. Operating the tanker - Couple up the 6” hose either on the side or at the rear to the Bauer
coupling ensuring that the connection is airtight.
2. Open the appropriate valve, place the vacuum pump in the vacuum position then start the
PTO (at low engine speeds). Operators of tankers fitted with a hydraulic drive pump should
ensure both hydraulic hoses are connected to the tractor’s spool valves before engaging.
3. Watch the gauge on the front and take note of its reading as the hose becomes full, at this
point increasing vacuum is pointless as this is the point when the smallest amount of vacuum
is lifting the liquid.
4. By controlling the PTO speed you will be able to maintain this situation. (This greatly reduces
the risk of over filling and reduces the amount of froth created during loading).
5. When liquid becomes visible in the sight glass immediately shut the appropriate valve, shut
down the engine revs and when the engine is idling shut off the pump.
6. Uncouple the hose and change the pump position to pressure.
7. When emptying the tanker allow the pressure to build up then open the back rear valve -
never turn with the PTO running and always start and stop the pump at low engine revs.
Hertell Pump operating instructions:
1. Must be used in the 540 RPM PTO mode, the PTO speed must not exceed 350rpm.
2. There must be one oil drop, every one to two seconds, visible in the oiler. Remember this is
TOTAL oil loss, so MUST be checked and topped up daily to the top of the tank. Please note
the dip stick does not have a mark on it.
3. Check the oil level in the front gear box housing regularly.
4. Due to the weight and speed at which the main pump rotor rotates it is vital that the input
PTO speed is low when the pump is started or stopped.
