GPO Vehicles


Make Landrover
Model Short Wheelbase Safari Station Wagon
Type Landrover Station Wagon Type 3
Body Builder  
Use Cabling use, fitted with a Bull Winch
Registration Number SYF 50F
Fleet Number  
Date of picture  

P.O. ENGINEERING INSTRUCTIONS
TOOLS & TRANSPORT
VEHICLES
B 3615
Issue 1, 1.6.69

MOTOR TRANSPORT
Landrover Station Wagon Type 3

1. General
This Instruction describes the Landrover Station Wagon Type 3 and the facilities it provides. Its main use is as a cabling winch.

2. Description
The vehicle above is a short wheelbase (88 in.) Landrover Station Wagon, fitted with a front-mounted 2500 lb. capstan winch and a centre-mounted bull winch with self-winding take up drum. Hand throttle controls are provided for each winch and a 4-wheel brake locking system is fitted. The vehicle controls are illustrated in Figs. 2 and 3.

Fig 2
Fig 3

3. Cab
The cab provides seating for the driver only. The centre-mounted winch occupies the space where the passenger seat is normally fitted.

4. Body
The body (Fig. 4) is the standard station wagon type, modified to provide storage space for the cabling attachment described in par. 10. The rear door has a locking device to hold it open.

Fig 4
Fig 5

5. Seating
There is a passenger seat in the rear of the vehicle. This may not be used when the full complement of tools is being carried, as the vehicle will be overloaded (see par. 18).

6. Engine
A petrol engine is fitted. Two hand throttle controls are provided for use with the winches:-

(a) A quadrant lever on the dashboard (Fig. 2), Connected to the engine governor, is used to pre-set the engine speed when using the front-mounted capstan winch. Two red emergency stop buttons on the front of the vehicle, cut out the ignition when either is depressed. The button remains in that condition until reset by a rotary movement, which allows it to spring out again.
(b) The winch control lever (Figs. 4 and 5) at the rear of the vehicle controls the engine speed directly when using the central-mounted winch. An ignition cut out button is incorporated in the control lever itself (Fig. 6) and two over-riding switches by-pass the cut out button in the two parked positions of the control lever.

Fig 6

If the engine will not start, check that the emergency buttons in (a) are out and that the control lever in (b) is fully in the stowed position with the safety catch fastened.

The 10 gal. fuel tank gives a range of approx. 130 miles but this is reduced when the vehicle is used for winching.

7. Brake locking device (Fig. 3)
Whenever the vehicle is used for winching all four wheels must be locked. When used for cabling in conjunction with the cabling attachment, locking the wheels will provide sufficient stability without employing additional anchors. The brake locking device is a non-return valve in the hydraulic braking system which retains the hydraulic pressure applied by the brake pedal.

The method of operation is as follows:-

(a) Rotate the brake locking system knob on the dashboard anticlockwise as far as it will travel; the warning lamp will light, showing that the system is operative.
(b) Depress the foot brake pedal firmly to lock the wheels. Check that the pressure has been maintained by pressing the pedal a second time. The pedal travel should be greatly reduced.
(c) Check that the ĎBrake oní lamp (Fig. 4) at the rear of the vehicle is giving a visual indication that the brakes are held on.

NOTE:- The brakes will only be held on at the pressure which has been applied by the foot pedal, and this must be sufficient to lock the wheels.

To release the brakes, turn the knob fully clockwise to the OFF position. The warning light on the dashboard will be extinguished.

DO NOT ATTEMPT TO DRIVE AWAY IF THE WARNING LIGHT IS ON.

8. Stabilizing jacks
Two screw jacks are provided with the vehicle. They can be attached to lugs at the front or rear of the vehicle (see Figs. 4 and 7). They are used to relieve the load from the vehicle suspension when a winch line leaves the vehicle with a downward pull.

Fig 7
Fig 8

9. Ground anchors
Two ground anchors are provided with the vehicle (see Fig. 4). Each consists of a length of angle iron drilled on both faces to receive the steel fixing pins. The angle iron is pinned open side downwards to the ground. At each end of the angle iron is a larger hole for attaching a rope. Two anchors can thus be used in series if necessary.

The point of attachment of the anchor rope to the vehicle is the eye of the central swivelling pulley (Fig. 8).

10. Cabling attachment
This device, illustrated in the stowed position (Fig. 4), is provided to reduce the number of occasions when it becomes necessary to rig snatch blocks to guide the cabling rope. It consists of two parallel tubes supporting a large and a small pulley, which may be moved into convenient positions along the tubes. The large pulley is grooved to accommodate either the winch rope or the cable, while the small pulley has a groove for the winch rope only. The upper end of the attachment which carries the small pulley is connected, by means of a bolt, to the end of an extendible tube housed under the floor of the body. The lower end rests in the jointing chamber and the large pulley is adjusted to lie in the correct position for guiding the rope from the mouth of the duct. The rope then passes under the lower and over the top pulley. The device can be used in either joint boxes or manholes.

11. Transfer gears and front wheel drive control
A transfer gear-box is provided to select one of two ratios in the output from the main gearbox, giving high and low ranges of gears (see Fig. 2). The transfer gear lever has three positions; HIGH (forward), NEUTRAL (centre), and LOW (rearward), and should be moved only when the vehicle is stationary. In the LOW position four wheel drive is automatically engaged, in the HIGH position the drive is normally to the rear wheels only, but when required for travel over difficult terrain, four-wheel drive can be obtained by depression of the yellow front-wheel drive control knob. Front-wheel drive can be disengaged by stopping the vehicle and moving the transfer gear lever first to LOW and then back to HIGH. The vehicle should not be driven on metalled roads with front-wheel drive operative.

To stop the winch in an emergency, strike one of the two red STOP buttons mounted on the front wings. The button must be restored manually before the engine can be restarted.

After use, disconnect the capstan drive by moving the knob on the winch casing and lock in the free position with the safety bolt.

A shear pin is included in the drive and is designed to shear if the winch is overloaded. In this event a new pin must be fitted before the winch can be restored to service.

12. Front winch
This is a vertical capstan mounted in front of the radiator grill. It is designed for use with a 3.75 in. circumference natural fibre rope, which requires two turns round the capstan. A horizontal roller is mounted in front of the capstan to cater for vertical pulls. The power take off is from the front of the engine through gearing and is engaged by depressing a knob on the winch casing. The engine must not be running when the winch drive is engaged.

To use the winch the procedure is:-

(a) With the engine stopped apply the 4-wheel brake locking system and fix the stabilizing jacks to the front bumper as required.

(b) Engage the winch drive by moving the knob on the winch casing, after releasing the safety bolt.

(c) Start engine.

(d) Move the hand throttle control to the first notch.

The capstan will now be rotating at a rope speed of approx. 30 ft./min. The engine is governed to hold this speed under load.

Fig 9
Fig 10

13. Central winch (Figs. 9 and 10)

(a) Description
This is a mechanically driven self reeling bull winch set for a maximum pull of 4000 lb. and fitted with a 5/16th diameter 6-19, 991 construction, R.H. ord. lay steel rope 470 yds. in length. The drive is from the gear-box power take-off and incorporates a torque limiter.

The winch may be used to pull in any direction by means of the swivelling pulley underneath the vehicle (Fig. 8).

(b) Controls
The winch brake lever (Fig. 10), when applied, locks the rope. On some winches the brake operates in one direction only and allows the rope to be wound in freely whilst, at the same time, preventing unwinding. The rope in/rope out control is duplicated in the cab (Fig. 10) and the rear of the body (Fig. 4). The vehicle clutch and accelerator controls are duplicated in the winch control lever (Figs. 4 and 5) so that the winch may be started and stopped and the speed of operation varied from either the driving seat, or from the rear of the vehicle.

(c) Torque limiter
Before using the winch the torque limiter must be checked, as it may tend to bind after a period without slipping and require a higher load than normal before operating, with consequent risk of breaking the winch rope. The checking routine causes the limiter to slip and allows the limiter to be set at the highest safe figure consistent with rope strength.

(d) Operation
The method of checking the torque limiter is as follows:-

(i) From the driverís seat, lock all four wheels (par. 7), put transfer gears in neutral, and engage the power take off by moving the lever (Fig. 10) rearwards.
(ii) Move control backwards to ROPE OUT position as shown in Fig. 10. (It is important that the ROPE OUT position is selected, as selection of the ROPE IN position may result in breakage of the spring loaded hook (Fig. 11) or the rope itself).
(iii) Apply the winch brake lever (Fig. 10) to lock the winch.
(iv) With the engine idling, select bottom gear and gently release the clutch. The engine will slow down under the load when the torque limiter slips.
(v) Restore the vehicle gear to neutral, release the winch brake, and restore the rope control to neutral.
(vii) To stop the winch put the control lever to the CLUTCH OUT position
(viii) On winches fitted with the free wheel type winch brake, the winch brake lever may be applied before pulling in. This prevents stored up tension in the rope from spinning the storage drum when the winch is stopped, by disengaging the clutch. If the drum is allowed to spin, even momentarily, the rope turns become loose causing uneven layering, bending of the layering arm and chain breakages. To pull in the rope put the control to ROPE IN and release the clutch. Maintain the ignition and regulate the speed as required. The winch will pull with the maximum tension set by the torque limiter without any slipping of the rope on the bull-winch, only if the take up reel applies sufficient tension to the rope. This tension is applied via a slipping clutch driven by a light chain and is normally pre-set. Tension can be increased by tightening the rope tension adjusting nut (Fig. 10). This should be adjusted so that rope slip does just not occur. It should not be over tightened.
(ix) TO STOP THE WINCH IN AN EMERGENCY - RELEASE THE SAFETY BUTTON.
(x) To restart the winch after the engine has been stopped put the control lever to the CLUTCH OUT position and use the starter button in the cab.
(xi) When winching has been completed all controls should be restored to their normal positions before attempt is made to drive the vehicle away. The winch rope must be attached to the stowage hook while there is still sufficient length available for turning the eye to the correct position for engaging the hook and while the rope is stationary. When hooked on, the rope may be wound in slowly until the stowage lever commences to move against the tension spring. The engine may now be stopped, the control lever put into the parked position and the safety catch put on (to prevent the lever bouncing and cutting out the engine when the vehicle is in motion). The rope control should be put into neutral, the power take off disengaged, the transfer gear lever to HIGH, the vehicle gear to neutral, the winch brake on (to prevent the rope from slackening and falling off the stowage hook) and the 4-wheel brake lock switched off.

When operating from the driving seat the vehicle clutch and accelerator pedals are used for controlling the winch. The rear control lever is left in the PARKED position.

(e) For day-to-day lubrication use normal chassis lubricating grease (P.O. Grease No. 1.) Check that all grease points (four in all) are free from dirt and that the grease can enter the nipples when applied, as follows

(i) Chain tensioner. Give one stroke of the grease gun every day before starting the winch.
(ii) Spooling arm (two points). Give one stroke of the grease gun on each of the two points once a week.
(iii) Swivelling pulley. Give one stroke of the grease gun every day.

Fig 11
Fig 12

14. Care of the steel rope
The rope fitted to the central bull winch should be maintained in good condition and must be renewed when broken strands appear. A breakage in use will necessitate a return to the workshop for repairs and probably the loss of a dayís output.

Changing of broken or worn ropes and refixing of damaged eyes will be carried out either by the M.T. Workshop or by the Mechanical Aids Workshop.

15. Vehicle tools
These consist of a vehicle jack, a starting handle and a wheel brace, which are stored in the near-side cab locker, and a jack handle which is stored behind the passengerís seat in the body of the vehicle.

16. Fire extinguisher and first aid box
The fire extinguisher is mounted in the cab underneath the near-side dash compartment, and the first aid box is mounted inside the compartment.

17. Spare wheel
This is carried on the bonnet.

18. Loads
The kerb weight of the vehicle, complete with cabling aids and tools, is 37 cwts. The gross moving load is 39.75 cwts. This allows a driver and 1.25 cwts. of stores to be carried.

19. Towing capacity
The towing capacity is 45 cwts.

20. Security
The vehicle is equipped with the normal vehicle locks on the driverís door and the rear door. Window locks are provided. The near-side door is fitted with an interior catch.

21. Signwriting
Standard inscriptions for signwriting are given in C 0015.

22. General precautions
When using either winch, the vehicle and guards must be so positioned that the public cannot come into contact with the winch rope. When cabling, extra care must be taken in guarding the open hole when the winch operator is working on his own. An effective communication system between the operator and the far end is essential for proper control, to prevent damage to equipment or accident to personnel.

The 4-wheel locking system must always be employed irrespective of the use of other forms of anchorage.
The extension tube (Fig. 12) may be subjected to end thrust when using the cabling attachment, and it should be verified that the locking pin is correctly located, to prevent the possibility of telescoping.

When using the rear winch controls the operator should stand at the near-side of the vehicle with his left hand on the control handle, thus keeping away from the line of pull of the winch rope.

When using the front winch the operator should stand at the front of the vehicle and within reach of an emergency stop button. The operator should avoid any position where he might be struck if the vehicle jerked forward.
Both winches are fitted with overload devices, the front winch with a shear-pin and the central winch with a slipping clutch, but there is always a danger of a faulty or damaged rope breaking under tension.

NOTE:- KEEP ALL PUBLIC AND STAFF WELL AWAY FROM WINCH ROPES.

Reference:- C 0015

 

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Last revised: November 09, 2010

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