Clarke Fire Pump Engine JU4H-UFH2

IMPORTANT: Set main pump controller to “OFF” while servicing engine.

Before turning the main pump controller to the 'OFF' position, check with the maintenance and security supervisors to verify that all the departments concerned will be alerted of the temporary interruption of their fire protection equipment for normal maintenance or testing.

Also, alert the local fire department in the event that the main pump controller is connected by silent alarm to headquarters.

When servicing is complete, return main pump controller selector to 'Automatic' position and the mode selector on the engine to 'Automatic' position.

Advise the appropriate personnel the engine has been returned to the 'Automatic'.

Changing the cartridges and bleed any air from the fuel system as per instructions given in section 3.1.1.

Fuel filter changes should take place as per recommendations and only using approved filters. It may also be necessary to change filters out with the recommendations in the event of:

1) The engine has had an overhaul.

2) The quality of the fuel is questionable.

3) The engine has been subjected to temporary adverse conditions outwith it normal operating parameters.

4) The fuel tank condensation trap has not been drained in line with manufacturer’s recommendations.;

A mechanical governor controls the engine speed.

The governor is built into the fuel injection pump. All governors are adjusted to the rated speed at nameplate power or maximum allowed pump load before leaving Clarke.

During Start-Up Inspection or when placing reconditioned units into service, some minor speed adjustment may be required. It is recommended that this adjustment be performed by the authorized Service Dealer representative.

To adjust the speed of the engine:

A. Start the engine by following the “To Start Engine” Procedure in this manual.

B. Let the engine warm-up. Loosen the jam nut(s) (Figure #38).

C. While observing the instrument panel tach rotate the long adjustor clockwise to lower the RPM and counter clockwise to raise the RPM’s until desired speed is obtained. Ref. Figure #38.

D. Holding secure the long adjustor with a wrench tighten the jam nut.

E. Stop engine by following “To Stop Engine” Procedure in this manual.;

During filling of the cooling system, air pockets may form. The system must be purged of air prior to being put in service.

This is best accomplished by filling with a pre-mix solution.

Caution: Do not overfill cooling system.

A pressurized system needs space for heat expansion without overflowing.

Engines without Coolant Recovery Tank:

Install the pressure cap, start and run engine for approximately 5 minutes in order to purge the air from the engine cavities.

When verifying that the coolant is at a safe operating level, it is best to wait until the engine temperature drops to approximately 120oF (49oC), or lower, before removing the pressure cap.

Remove the pressure cap and refill to the proper fill level. To continue the deaeration process start and run engine until the temperature stabilizes a approximately 160°-200° (71°-93° C) or run engine for 25 minutes, whichever is longer.

IMPORTANT: Set main pump controller to “OFF” while servicing engine. Before turning the main pump controller to the OFF" position