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PRATTLINE LOTOW OPERATING INSTRUCTIONS

RAISING OF CARAVAN

1.         UNDO FOUR CORNER HOLD DOWN CLAMPS.

2.         OPEN TOP HALF OF DOOR AND HOOK BACK.

3.         TAKE PUMP KEY AND OPEN FOUR TOP VALVES ON PUMP ANTI-CLOCKWISE

            ¼ TURN.

4.         CLOSE BOTTOM VALVE (MARKED RETURN) FIRMLY UNTIL CARAVAN TOP HAS RISEN APPROXIMATELY ONE FOOT.  CHECK TO SEE IF CARAVAN IS RISING EVENLY, IF SO CONTINUE TO PUMP UNTIL CARAVAN TOP IS FULLY ELEVATED.  

            PUMP HANDLE WILL BECOME FIRM AT THIS STAGE.

5.         IF CARAVAN IS NOT RISING EVENLY THIS CAN BE ADJUSTED BY USING VALVES ON PUMP FACE:-

EXAMPLE  A/.  IF FRONT OF CARAVAN IS LIFTING FASTER THAN REAR CLOSE OFF VALVES 1 & 2, CONTINUE TO OPERATE PUMP UNTIL CARAVAN IS LEVEL THEN RE-OPEN VALVES 1 & 2 BY ¼ TURN AND PUMP CARAVAN UP.

EXAMPLE B/.  IF REAR OF CARAVAN IS LIFTNG FASTER THAN FRONT, CLOSE OFF VALVES 3 & 4 AND CONTINUE TO PUMP AS IN EXAMPLE  A.  THEN RE-OPEN VALVES 3 & 4 AS ABOVE AND CONTINUE TO PUMP.

NOTE:  IT IS QUITE NORMAL FOR THE CARAVAN TO BE AS MUCH AS 4” OUT OF ALIGNMENT IN THE RAISING AND LOWERING OPERATION.

GO INSIDE CARAVAN AND PLACE SAFETY RODS IN POSITION ALONG SIDE OF LIFTING RAMS IN SOCKETS PROVIDED.

LOWERING OF CARAVAN

1.         MAKE SURE THAT THERE IS NOTHING LEFT ON THE TOP OF WARDROBE AND CUPBOARDS THAT COULD GO THROUGH CEILING WHEN LET DOWN.

2.         UNDO RETURN VALVE A ½ TURN QUICKLY AND ALLOW THE CARAVAN TO LOWER.

3.         HOOK UP FOUR HOLD-DOWN CLAMPS.

4.         MAKE SURE LEVELLING JACKS ARE WOUND UP FULLY.

5.         ENSURE THAT CARAVAN IS CORRECTLY COUPLED TO CAR AND SAFETY CHAINS AND LIGHTING PLUGS ARE CORRECTLY CONNECTED.

6.         CHECK ALL ROAD LIGHTS.

7.         FIT AND ADJUST TOWING MIRRORS.

LEVELLING OF CARAVAN ON SITE

1.         ENSURE THAT THE CARAVAN IS REASONABLY LEVEL BEFORE DISCONNECTING FROM THE CAR.  IF THE SITE IS NOT LEVEL FROM SIDE TO SIDE YOU MAY BE ABLE TO SCOOP OUT ON HIGH SIDE IN FRONT OF WHEELS AND THEN DRIVE FORWARD TO ALLOW IT TO DROP IN, OR PLACE A WOODEN BLOCK UNDER LOW SIDE AND THEN DRIVE UP.

2.         CHOCK WHEELS WITH SUITABLE CHOCK (IF SITE IS NOT LEVEL BOTH FRONT AND BACK) FOR SAFETY AND THEN UNCOUPLE CAR.

3.         AFTER, MOVE CAR AWAY, LOWER FRONT OF CARAVAN WITH ADJUSTABLE JOCKEY-WHEEL 2” BELOW LEVEL.

4.         DROP REAR SUPPORTS AND SCREW DOWN UNTIL THEY TOUCH THE GROUND.

5.         WIND UP JOCKEY-WHEEL TO BRING CARAVAN SLIGHTLY ABOVE GROUND LEVEL.

6.         DROP THE FRONT LEGS AND ADJUST TILL TOUCHING THE GROUND.

7.         LOWER THE JOCKEY-WHEEL TAKING UP DRAW BAR WEIGHT ONLY.

IF PUMP IS NOT WORKING

1.         CHECK THAT THE RETURN VALVE IS CLOSED AND THE TOP FOUR VALVES OPEN.

2.         CHECK FOR BROKEN HYDRAULIC LINES.

3.         CLOSE OFF 1, 2, 3, & 4 VALVES AND OPEN RETURN VALVE.

4.         PUMP HAND WANTING TO COME BACK UP IS DUE TO NON-RETURN VALVE NOT SEATING.  IF THIS IS THE CASE REPEAT INSTRUCTION No.3 AND THIS WILL GIVE A QUICK FLASH OF FLUID PAST THE SEAT AND SHOULD CLEAR ANY FOREIGN MATTER AWAY.

5.         IF THIS HAS NOT RECTIFIED THE PROBLEM REMOVE THE HEXAGON NUT ON THE NARROW FACE OF PUMP AND TAKE OUT SPRING AND BALL AND CLEAR SEAT. REPLACE BALL AND WITH A PUNCH GIVE A FIRM TAP TO RE-SEAT BALL, REPLACE SPRING AND NUT.

SERVICE HYDRAULIC PUMP

1.         PUT CARAVAN IN DOWN POSITION.

2.         REMOVE BOLT IN TOP OF PLUNGER.

3.         REMOVE TWO SCREWS IN BRASS SLEEVE.

4.         PULL PISTON NUT.

5.         REMOVE OLD RUBBER “O” RINGS AND REPLACE WITH NEW ONES.

6.         RE-ASSEMBLE WITH RETURN VALVE OPEN.

7.         REMOVE TURN-OFF VALVES, REMOVE OLD “O” RINGS AND REPLACE WITH NEW ONES.

SERVICE HYDRAULIC RAMS

1.         PUMP CARAVAN UP AND PUT IN SUITABLE PROPS TO HOLD TOP UP.

2.         REMOVE SCREWS IN FLANGE UNDER CUPBOARD.

3.         OPEN VALVE ON PUMP, THEN PUSH CHROME RAM DOWN SO TO RETURN FLUID TO TANK.

4.         FROM UNDER THE FLOOR OF CARAVAN UNDO BRASS NUT THAT ATTACHES THE BLACK HOSE TO THE RAM.

5.         UNDO THE TWO CASTLE NUTS OF THE SADDLE AT THE TOP OF COPPER RAM AND THEN PULL OUT RAM COMPLETE.

6.         PULL OUT CHROME TUBE FROM THE COPPER CYLINDER.

7.         WITH AIR-HOSE ON THE BOTTOM OF CYLINDER BLOW OUT PISTON WITH THE TOP END PLACED IN A BUCKET TO CATCH THE PISTON.

8.         REMOVE OLD “O” RINGS, REPLACE WITH NEW THEN RE-ASSEMBLE.

REPLACEMENT “O” RINGS ARE AVAILABLE FROM PRATTLINE CARAVANS AGENCIES OR BEARING SERVICE OR CONSOLIDATED BEARING OUTLETS.

PARTS REQUIRED:- 

                        5    BS 010 PUMP “O” RINGS

                        2    BS 114 PUMP “O” RINGS

                       12   BS 115 PUMP “O” RINGS

HYDRAULIC FLUID COMPOSITION

                        8   PARTS WATER

                        1   PART SOLUBLE OIL – CASTROL SUPER EDGE 7

                        1   PART ANTI-FREEZE

IF A SMALL LEAK OCCURES TOP-UP WITH WATER ONLY.

TOTAL SYSTEM TAKES 10 PINTS OF MIXTURE.

ELECTRICAL COMPLIANCE INSTRUCTIONS

ON ARRIVAL AT SITE:

1.         FIRST ESTABLISH THAT MAINS SUPPLY IS ALTERNATING CURRENT (AC) AND OF SUITABLE VOLTAGE.

2,         INSERT THE INLET PLUG ATTACHED TO THE SUPPLY FLEXIBLE CORD INTO SOCKET ON THE CARAVAN LOCATED AT THE FRONT OFF-SIDE.

3.         INSERT THREE PIN FLAT PIN PLUG ON OTHER END OF THE SUPPLY FLEXIBLE CORD INTO PLUG SOCKET OUTLET PROVIDED BY THE SITE OWNER, AND SWITCH ON SUPPLY.

4.         CHECK TO SEE THE CARAVAN INSTALLATION OPERATES.

5.         IF ANY DIFFICULTY ARISES CONSULT THE SITE OWNER, ELECTRICITY SUPPLY AUTHORITY OR A LICENSED ELECTRICAL CONTRACTOR.  IT IS DANGEROUS FOR UNSKILLED PERSONS TO ATTEMPT REPAIRS OR ALTERATIONS.

6.         IF SUPPLY TO CARAVAN IS TO BE TAKEN FROM A PLUG SOCKET IN A RESIDENCE IT IS ESSENTIAL TO ESTABLISH THAT THE PLUG SOCKET IS EARTHED BEFORE CONNECTION IS MADE.   IT SHOULD BE NOTED THAT ALTHOUGH PLUG SOCKETS IN DOMESTIC INSTALLATIONS ARE NOW REQUIRED TO BE EARTHED IN ACCORDANCE WITH THE SAA WIRING RULES, THERE ARE STILL MANY UNEARTHED THREE PIN SOCKETS EXISTING IN OLD INSTALLATIONS.

ON LEAVING SITE:

7.         SWITCH OFF THE SWITCH AT THE SITE SUPPLY POINT.  WITHDRAW THE PLUG FROM THE SOCKET INLET AT THE SUPPLY POINT.

8.         WITHDRAW THE INLET PLUG FROM THE CARAVAN INLET SOCKET AND REPLACE ANY COVER THAT MAY BE PROVIDED TO PROTECT THE INLET SOCKET FROM MOISTURE AND DUST.

9.         COIL UP THE FLEXIBLE CORD AND PUT IT AWAY IN A LOCATION WHERE IT WILL NOT BE DAMAGED.

*** NOT APPLICABLE TO CARAVANS WHERE THE SUPPLY FLEXIBLE CORD IS PERMANENTLY CONNECTED.