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Page 12 GCR Class 8B

Page 12 GCR Class 8B

105. Cylinder Cover Right

- Sheet 4

Springs

106. Axle Box Spring Mount

- Sheet 4

107. Axle Box Spring Mount

- Sheet 4

108. Axle Box Spring Mount

- Sheet 4

109. Axle Box Spring Mount

- Sheet 4

110. Rear Wheel Spring Mount - Sheet 5
111. Rear Wheel Spring Mount - Sheet 5

Wheels

112.

Centre Wheel Weights

- Sheet 5

113.

Centre Wheel Weights

- Sheet 5

114.

Wheel Weights

- Sheet 5

115.

Wheel Weights

- Sheet 5

116. Not Defined
117. Not Defined

Bits and Pieces

118. Lamp Bracket Top

- Sheet 4

119.

Smoke Box Handle

- Sheet 4

120.

Smoke Box Handle

- Sheet 4

121.

Regulator Lever

- Sheet 4

122.

Regulator Plate

- Sheet 4

123.

Regulator Plate

- Sheet 4

124.

Footplate Connection

- Sheet 4

125. Smoke Box Door Hinge - Sheet 4
126. Cab Roof Blanking Plate - Sheet 5
127. Ramsbottom Actuators - Sheet 4
128. Ramsbottom Actuators - Sheet 4
129. Ramsbottom Side Cover - Sheet 5
130. Rear Wheel Spring Mount Locator - Sheet 5
131. Rear Wheel Spring Mount Locator - Sheet 5

Assembly Aids

132.

Valence Spacing Aids +EM

- Sheet 5

133.

Valence Spacing Aids +EM

- Sheet 5

134. Valence Spacing Aids +EM - Sheet 5
135. Valence Spacing Aids +EM - Sheet 5
136. Footplate Assembly Aid - Sheet 4
137. Cab Assembly Aid - Sheet 5
138. Cab Assembly Aid - Sheet 5
139. Fire Box Support Aid - Sheet 5
140. Fire Box Support Aid - Sheet 5
141. Belpaire Filing Aid - Sheet 5

GCR Class 8B

1. Drwg. 254 Dome Original (1 supplied)
2. Drwg. 251 Chimney Original (1 supplied)
3. Drwg. 239 Ramsbottom 4-column Safety Valve

4M778 Alan Gibson

LNER C4

4. Drwg. 252 Chimney Flowerpot (1 supplied) or

Drwg. 253 Chimney GCR Pseudo (1 supplied)

5. Drwg. 255 Dome Reduced (1 supplied)
6. Drwg. 228 Snifter (1 supplied)
7. Ross Pop Safety Valves Markits MASftyV7 £3.26

(2 supplied)

Additional Parts Required - not part of the kit

Wheels, motors and gears are a personal choice - these were
the ones used by the designer

1. Wheels Gibson G4880B 6’ 8” Dia. Alan Gibson
2. Crank Pins 4M42B Alan Gibson
3. Bogie Wheels G4842 3’ 6” Dia. Alan Gibson
4. Rear Wheel G4851 4’ 3”12 Spoke Alan Gibson
5. High Level Gear Box SlimLiner 40:1 2mm shaft
6. Mashima Motor 2mm shaft
7. Buffers AG 4M4901 £5.00 set of four or 4M4909

or Markits LNER Stepped

8. Markits Screw Couplings MCOUP/S

Recommended Tool

If 14 BA bolts are used to fix the cosmetic springs

CSTB141 Carbon Steel Taper Tap 14BA Eileen’s £14.40

If the eccentrics are fitted you will need a 16 BA tap

Carbon Steel Taper Tap 16BA CSTB161 £20.00

Summary of Contents for Robinson GCR Class 8B Atlantic LNER C4

Page 1: ...Railway locomotives Great Central Models Ltd is registered as a Private Limited Company 7355519 Further details www greatcentralmodels co uk Enquiries to sales greatcentralmodels co uk or via the con...

Page 2: ...he whistle from the cab top onto the boiler happened for the same reasons of loading gauge As always a good picture is the best guide provided the dating is accurate For guidance according to RCTS dat...

Page 3: ...hen they all became black again Under LNER management the beading was always unpainted and usually unpolished Tenders when built for 192 194 were the GCR 3 250 gallon version but these were soon repla...

Page 4: ...g things While there are traditional etched springs on Sheet 3 for this kit the centre springs have been printed using 3D CAD technology They are fitted to the horn blocks Note that these are heat sen...

Page 5: ...ce when the fret is etched TABS are on the parts to fit into SLOTS in the corresponding parts In many areas on the fret TAGS have been arranged so that they fit onto TABS solely to help minimize any p...

Page 6: ...hen heated to solder them together Take care to hold parts carefully with insulating material where needed and to let them cool properly before handling This is especially true if annealing parts so t...

Page 7: ...y for P4 modellers and less so for EM modellers This rear boss should be removed from Alan Gibson wheels Potential purchasers in the fine scale gauges are urged to consider these points There are as a...

Page 8: ...linder Head Sheet 3 53 Safety Loop Sheet 1 54 Safety Loop Sheet 1 Brakes 55 Brake Frame Mount Sheet 1 56 Brake Frame Mount Sheet 1 57 Brake Frame Mount Sheet 1 58 Brake Frame Mount Sheet 1 59 Brake Fr...

Page 9: ...eet 1 165 Hex Bolt Head Sheet 1 166 Hex Bolt Head Sheet 1 167 Bogie Spring Hanger Sheet 1 168 Bogie Spring Hanger Sheet 1 169 Bogie Spring Hanger Sheet 1 170 Bogie Spring Hanger Sheet 1 Cross Heads 17...

Page 10: ...2 supplied cast items 18 Drwg 258 Smoke Box Door 1 supplied 19 Drwg 260 Martkits M4HRKWDs 12 Supplied 20 Drwg 261 MarkitsRAXFBsq601 axle boxes 4 supplied 21 Drwg 262 GC Smoke Box Handle Markits M4SBD...

Page 11: ...b Sheet 4 46 Inspection Cover Sheet 5 47 Inspection Cover Sheet 5 48 Inspection Cover Sheet 5 49 Inspection Cover Sheet 5 50 Inspection Cover Sheet 5 51 Fire Box Brace Sheet 5 52 Fire Box Brace Sheet...

Page 12: ...cing Aids EM Sheet 5 136 Footplate Assembly Aid Sheet 4 137 Cab Assembly Aid Sheet 5 138 Cab Assembly Aid Sheet 5 139 Fire Box Support Aid Sheet 5 140 Fire Box Support Aid Sheet 5 141 Belpaire Filing...

Page 13: ...et 2 to practice Drill out the frame stiffener locating holes to 0 3 mm in Frame Left 1 and Frame Right 2 see picture right Measure the short handrail tails which will be used for the springs they wil...

Page 14: ...oles to 0 3 mm Remove these parts from the fret and with the aid of some 0 3 mm brass wire locate and solder into place on the inside of both frames Locate parts Valve Guide Support Spacer Stiffener L...

Page 15: ...Frame Spacer Brace 13 or 13EM Solder these in place checking the width of the frames carefully after each one 16 20 mm for P4 and 14 80 for EM Once these are fitted and you are certain the frame is w...

Page 16: ...ing and fitting as normal Drill the two small holes in Cylinder Heads 49 52 to 0 45 mm Drill the large centre hole to 2 4 mm or for the Markits crosshead 2 1 mm Remove Cylinder Heads 49 52 from the fr...

Page 17: ...uld be used unless you are confident of great accuracy in which case the half etch layer may be left out Remove the two sets of Cross Head parts 171 184 from the fret and align each set locating them...

Page 18: ...er crank pin holes to suit your crank pin bearings The front crank pin is rather shorter than on the other axles if the crank pin nut is reversed Drill out the coupling rods to suit your choice of cra...

Page 19: ...the draw plate slot Fit Drwg 216 Rear Buffers in place and solder Secondary Frame Push out the rivets if required in Rear Frames 236 237 and remove them from the fret Bend so that the half etch is on...

Page 20: ...re needed and solder into place Remove Couplers 34 35 from the fret and solder into the front buffer beam Brake Cylinder Support Remove parts Brake Cylinder Supports 28 29 from the fret drill the smal...

Page 21: ...out the smaller holes to 0 5 mm and the larger holes in the bottom end of Lifting Arms 213 216 to 0 7 mm This is the end that is locked through the centre of the eccentric Steam Chest Rods Remove Valv...

Page 22: ...chanism Reversing Axle and Balance Weight The Counterweight Weight Drwg 211 will need a 1 2 mm hole drilled in the side halfway along into which can be soldered Balance Arm 225 Note For completeness o...

Page 23: ...om the fret bend to shape so that Rear Brake Pulls 95 96 will fit between them Remove Rear Brake Pulls 95 96 from the fret and solder together Pin to Brake Cylinder Links 93 94 using a short piece of...

Page 24: ...on the insides of the frames ensuring the front face is vertical and the inset on the front edge fits just under the bottom of the front buffer beam Front Bogie Note The Adams Bogie rotates around a c...

Page 25: ...lf etched leaf spring showing Remove Bogie Spring Hangers 167 170 from the fret if required and use a piece of 0 45 mm wire to locate Drill out the bottom holes in Bogie Frame 141 the holes in Bogie S...

Page 26: ...fully so that they fit as close to the frames as in the prototype Driving Axles side play Front wheel as little as possible since there is only a very small space between the coupling rod and the back...

Page 27: ...ich lasted until nearly grouping or 1 mm proud for the later blanked off version Note that this NiSi rod should fit inside the 2 4 mm tube if fitted in the cylinder block Centre Axle Spring Drwg 209 i...

Page 28: ...ark 0 45 mm on Cab Sides 55 57 if you intend to fit a pair of the GCR brass numbers Drill the cab side rail holes to 0 45 mm note that the hand rail was set forwards when side screens were fitted so c...

Page 29: ...tre slots only The rear tab should overhang the balsa Use Cab Assembly Aids 137 138 as shown to assist in getting these vertical Firebox Note The front of the fire box will need filing to shape there...

Page 30: ...ection Covers 46 50 from the fret curve to shape and solder in place These are fitted along the centre of the curved part of the boiler and at 3 mm 13 mm and 23 mm from the front of the cab on the lef...

Page 31: ...n these curved parts will locate on the tabs of the part of the fire box inside the cab Cab Cupboards Solder a couple of Door Hinges 77 80 on each of the Cab Cupboards 75 76 over the holes and add a 0...

Page 32: ...t and rear sections Curve the T shaped brass and solder to the centre of the roof or centre it at 11 5 mm from the front to be accurate Check the roof fitting but do not solder in place until the cab...

Page 33: ...steps Remove Rear Step Plate Left 96 Rear Step Left Upper 97 and Rear Step Left Lower 98 from the fret Bend Rear Step Plate Left 96 to shape as shown there is a distinct kink a few inches below the va...

Page 34: ...ss 8B Page 34 GCR Class 8B curve the valences to suit then solder into place against the foot plate support brackets 34 37 with the steps in position temporarily 56 You are here 1 58 You are here 3 57...

Page 35: ...early They should be an accurate fit if the footplate is straight Remove Boiler 1 from the fret and roll to shape with the locating marks on the outside The longitudinal ends should meet exactly Remo...

Page 36: ...ere always fitted on the right hand side Smoke Box Step Drill the hole in Smoke Box Step 8 and the hole in the front of the Smoke Box Frame 4 which is on the lower right side to 0 3 mm Remove Smoke Bo...

Page 37: ...15 17 Remove Lamp Brackets 15 17 from the fret bend to shape and fit to foot plate using 0 33 mm brass wire to locate them Trim any excess wire and file down Vacuum Pipe Locate the Markits Vacuum Pipe...

Page 38: ...te The tradition way for modellers to fit this is to attach a couple of small hooks to Foot Plate Connection 124 and a couple of loops to either the tender or locomotive according to preference Fittin...

Page 39: ...from the fret solder one hinge to door side and use the extension as a support for the hinge mechanism consisting of some very short lengths of 0 8 mm tube and 0 45 brass wire its easier than it soun...

Page 40: ...Page 40 GCR Class 8B Page 40 GCR Class 8B...

Page 41: ...Page 41 GCR Class 8B Page 41 GCR Class 8B...

Page 42: ...ttle more space for vertical movement This is soldered onto the inside of the main frame there are half etch vertical marks to assist in location 110 111 Rear Wheel Spring Mounts should be free to mov...

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