DRIVERS’ INSTRUCTION BOOKLET 200 HP SENTINEL GENERAL TECHNIQUE OF FIRING The two basic rules of firing the locomotive are as follows: Firstly – add fuel to the fire frequently but NOT in large quantities. Do not normally put on more than a four shovels full at one time. It will normally be found that frequent light firing will maintain a full head of steam and a bright fire. Secondly – do not fill the fire grate higher than two inches below the bottom of the fire hole door ring. If you have a bright red fire to within two inches below the fire hole door ring and the locomotive will not maintain or make its steam, DO NOT increase the size of the fire; some factor other than the fire will be the cause of the trouble and should be traced immediately. 1. When firing up from cold, as soon as the starts to make steam, assist the fire using the BLOWER; this will reduce the steam raising time considerably. The Blower can also be used in assisting to pull the fire up after fresh fuel has been put on a rather dead fire. 2. If the fire is smoking excessively, this may be lessened by making use of the EXTRA TOP AIR CONTROL; this will specially apply when the fire bars are inclined to be blocked and as the top of the fire may be suffering from air starvation. Opening the FIRE HOLE DOOR will achieve the same thing in a more drastic form but this is in general a bad practice. Remember that if an excessive amount of top air is taken through the fire hole door and up the chimney, it will reduce the amount of draught passing through the fire which will tend to make it go dead. GENERAL DRIVING INSTRUCTIONS FOR PUTTING THE LOCOMOTIVE INTO AND OUT OF SERVICE 1. CORRECTION OF WATER LEVEL WHEN STEAMING UP FROM COLD When the boiler is steaming and the water level rises, it is in order to blow the level down 2/3 of a glass when pressure is below 50 lbs. When 50 lbs., only blow down 1/3 of a glass at a time. 2. STARTING UP THE ENGINES FROM COLD OR AFTER STANDING IN EXCESS OF ONE HOUR. Open up the following Master Control Valves on the boiler:  Regulator stop valve,  Steam brake master valve,  Pump and injector master valve and  Boiler feed shut-off valves (2). Engines to be out of gear. Reversing lever to be in centre position. Drain valve to be open. Gently open the regulator and blow steam through engines for two or three minutes. Leave the regulator slightly open and move the reversing lever quickly backwards and forwards at least six times. Close the regulator. Put the reversing lever in either forward or reverse start position. Open regulator slightly and run engines until oil pressure reaches 30/40 psi. which is normal working pressure. Set the engines in either “high” or “low” gear as required. Do not close the drain valve until you are sure there is no priming taking place. Check lubricator test cock on regulator at intervals during the day or observe the sight feed in the where fitted. On no account must the engines be run if no oil is being pumped to the test cocks.

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3. DATA ON ROTOPLUNGE OIL PUMP The locomotive engines are fitted with a forced feed lubrication system to all major components. The oil is pumped by an automatically reversible rotary plunger pump which is capable of delivering 200 gallons of oil per hour against 50psi. at 500 rpm. 4. MAINTENANCE POINTS ON THE ROTOPLUNGE OIL PUMP The rotor shaft gland is packed with Cranes Super SS3 packing. It is most important that these packings are kept in good condition and are tightened (but not over tightened) very regularly. DRAINING WATER FROM CRANKCASE Frequently, daily if possible, open the drain cock under each crankcase and run off all water which may have accumulated. Allow locomotive to stand as long as possible (not less than 30 minutes) before attempting to drain off water in order to allow the water to separate from the oil. If the locomotive stands for more than eight hours, drain off water before starting engines. METHOD OF CORRECTLY OPERATING CUT OFF AND DIRECTION (REVERSING) LEVER If any difficulty is encountered in selecting the correct cut off by moving the reversing lever, turn the regulator handle clockwise as far as it will go. This automatically opens the Steam Release Valve and releases the steam trapped between the boiler and the engines. When this steam is released, no difficulty will be experienced in operating the Reversing Lever. Steam is admitted to the cylinders in Starting cut-off for approximately 75% and in the Fast cut-off for approximately 40% of the piston travel per working stroke. Do not keep the locomotive in starting cut-off for longer than absolutely necessary. Do not exceed 200 RPM with the reversing lever in the ‘Start’ position, i.e. 4-5 MPH in low gear, 9-10 MPH in high gear. TECHNIQUE OF GEAR CHANGING To change gear, the following procedure must be adhered to. The locomotive MUST be stationary before attempting to change gear or engage the gears. If the locomotive is already out of gear, proceed as per instructions “To Engage a Gear”. If it is already in gear, proceed as per instructions to “To Disengage a Gear” and, when Neutral is obtained, follow the instructions “To Engage a Gear”. TO ENGAGE A GEAR Fit the brass detachable gear lever handle to the appropriate square steel shaft on the boiler top. The right hand shaft operates High Gear and left hand shaft Low Gear. Pull the lever gently downwards. If the gear will not engage, fully disengage by pulling lever up. Put the reversing lever into “Forward Start” position and run the engines slowly for approximately three seconds, shut the Regulator and then attempt to gently engage the gear again just as the engines are ceasing to rotate. Repeat as necessary until the gear engages. If the gear only partly engages, move the reversing lever backwards and forwards with the regulator closed (this will remove the pressure off the gear teeth) whilst maintaining a gentle pressure on the Gear Lever. The gear will then fully engage. Do not attempt to move the locomotive until the gear is fully engaged. TO DISENGAGE A GEAR To take the locomotive out of gear, i.e. to put it in Neutral, the locomotive MUST be stationary. The Regulator should be fully closed and the Reversing lever put into the centre Drain position. The gear lever should then be moved upwards to vertical position. If any difficulty is encountered, continue to push the Gear Lever towards the Neutral position and, at the same time, move the Reversing Lever backwards and forwards with the Regulator closed. If this should fail to release the gear, do the same as before but just very slightly open and quickly close the Regulator; this will remove the pressure off the gear teeth and the gear will disengage.

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DRIVERS’ INSTRUCTION BOOKLET FOR 200 HP SENTINEL (Including additional information for Drivers/Fitters) PREPARING LOCOMOTIVE FOR USE 1. DETAILS OF ROUTINE LUBRICATION & MAINTENANCE Before commencing work with your Sentinel Locomotive, always carry out the following Daily checks on the major oiling points on the locomotive as given in items 1 to 6. Make a habit of carrying out the other items of daily, weekly and monthly maintenance at their appropriate times. Most of the other maintenance can be carried out during any spare time while the locomotive is standing or while it is being initially steamed. PREPARATION DETAILS: Item Type of Oil Remarks 1. Check crankcase oil Crankcase oil Oil level is to be half an inch either side of the full mark on each dipstick (2). Change oil every 1000 working hours or more frequently if an excessive amount of water enters the sump. 2. Check gear case oil Crankcase oil When checking, do not add oil if it runs out of test cocks on gear cases. Change oil every 12 months or at the time of the boiler inspection. 3. Check chain lubrication Crankcase oil & Run chain lubricator at frequent intervals paraffin or on adjustable type feed. Wick type: turn re-claimed oil tap “ON” during operation of locomotive. 4. Check cylinder and Cylinder oil Fill up to top of Filter at the beginning of countershaft bearing each shift, using a clean can. lubricator (Delvac pump) 5. Check boiler feed pump Cylinder oil As for item 4 and additionally, at the lubricator same time, drain steam cylinder water. 6. Check box oil level Crankcase oil Fill to level of hinge pin. Change oil and clean Armstrong oil pad every 12 months or at the time of the boiler inspection. Renew Armstrong oiler pads if necessary. It is most important that the cylinder and crankcase oil referred to above should be to Sentinel specification or one of the types specified. See paragraph on “Recommended Oils” at the end of this section. Use of thin machine oil (or suitably thinned C.C. oil as suggested) will enable drip feed type lubricators to be set for continuous operation notwithstanding temperature fluctuation of the engine compartment during operating hours. In the case of cylinder oil, it is specially blended to work at the high superheat temperature of these locomotives and in the case of the Crankcase oil, it is specially blended to allow for rapid water separation from the oil. On no account use oils which do not conform with the maker’s specification. Full specification on request. GENERAL METHOD OF OPERATING LOCOMOTIVE WITH REFERENCE TO BOILER FEED PUMP AND INJECTOR The locomotive is designed to maintain the water level in the boiler by means of the boiler feed pump. As far as possible, the pump should be set for continuous slow running so that it pumps water into the boiler at the same pace as the boiler water is evaporated; by this means, the water level is kept constant. The injector is a standby means of filling the boiler that should be used once a day to keep it in order and to test that it is working.

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PUTTING LOCOMOTIVE AWAY Put the locomotive out of gear and reversing lever in the centre position. Drain valve open. Regulator closed. Boiler filled up. Hand brake screwed ‘ON’. Driver’s steam brake valve in ‘OFF’ position. Damper shut. Close:  Regulator Stop Valve  Brake master shut-off valve  Pump and injector master shut-off valve  The two boiler feed shut-off valves PRECAUTIONS AGAINST FROST Should it be necessary at any time to leave the locomotive standing ‘dead’ where it will be exposed to frost, certain safeguards must be taken to protect the boiler, injector and pump: Carry out disposal as normal (See ‘Putting Locomotive Away’) and, in addition:  Drain boiler and tank.  Close tank filter cocks and open drain cock under filter box.  Drain pump steam and water cylinders.  Open injector water valve.  Drain gauge glasses.

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GENERAL INFORMATION AND DIMENSIONS 200 HP ‘SENTINEL’ LOCOMOTIVE A. GENERAL INFORMATION 1. Data of components of production and type. 2. Arrangement: 0-4-0 3. Minimum curve radius: 60ft. 4. Weight in working order: 34 tons. 5. a) Tractive effort – Low gear: Adhesive limit. b) Tractive effort – High gear. c) Gear ratios – high gear, low gear. 6. Fuel bunker capacity: 10/12 cwts. of COAL ACCORDING TO CLASS OF FUEL USED. 7. Water tank capacity: 660 gallons. 8. Engine crankcase oil capacity: 5 gallons in each of 2 engines. 9. Reduction gear case oil capacity:  High gear – 5 galls  Low gear – 5 galls. 10. Delvac Cylinder Lubricator Oil Pump Container Capacity: 3 pints. 11. Chain Lubricators: a) Adjustable (Individual): Drip feed containers (2) – single drip feed 1 pint each. b) Cylindrical single container with wick feeds (1) 1½ gls. 12. Axle boxes: Armstrong oilers (4) – 3 pints each to level pin. 13. Mechanical Lubricator For Worthington Boiler Feed Pump: 2 pints, initial filling.

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B. DIMENSIONS and DATA Length over headstocks 20’ 11” Length over buffers 23’ 8” Width overall 8’ 0” Height overall, with spark arrester, internal type 10’ 3¾” Gauge 4’ 8½” Wheelbase (nominal) 5’ 6” Journal size 10” x 5½” Wheel diameter on tread 38” ENGINE: “Sentinel” vertical enclosed high-speed (Two fitted) 2 – cylinder double acting, with reduction gear. Bore and stroke 6¾” x 9” Normal max RPM 500 Absolute max RPM 600 Max BHP (at 275 psi) 105 per engine Valve operating gear Camshaft Valve type Poppet Cut-offs (in each direction) approx 75% and 40% Weight of one engine 21 cwts. 1 qr. BOILER: “Sentinel” vertical water-tube type. Classification VL/43/C/275 Rated evap. (lbs/hour) 4300 Water capacity to top of gauge glass 213 gallons Weight of boiler (shell and only without 2T 17 cwts. mountings and superheater coil) Used with Good coal of 13500 B.TH/U/lb. Working pressure (psi) 275 Heating surfaces (Sq. ft.) Tubes 92.1 Firebox 51.0 Superheater 51.2 Grate area (Sq. ft.) 6.5 Grates Plain

[Retyped by Andy Chapman from an original manual supplied by Richard Nixon. 1-Jan-2012.]

Supplied by Andy Chapman of Somerset & Dorset Railway Heritage Trust, Midsomer Norton for HRA Training, & Education Committee 01.08.2017 - Further information can be obtained from Andy Chapman at [email protected]

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