Illustration: Centre Valve Body
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1 |
Centre valve body |
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2 |
Bypass valve |
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3 |
Bypass valve spring |
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4 |
Safety valve |
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5 |
Safety valve spring |
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6 |
Primary regulation valve |
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7 |
Primary control valve spring |
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8 |
Primary control valve piston |
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9 |
Primary control valve wedge |
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10 |
Primary control valve sleeve |
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11 |
Retaining bracket |
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12 |
Plug and valve for neutral control |
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13 |
1/2 Shift valve |
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14 |
1/2 Shift valve spring |
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15 |
1/2 Shift valve wedge |
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16 |
1/2 Shift valve plug |
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17 |
3/4 Shift valve |
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18 |
3/4 Shift valve spring |
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Illustration Centre Valve Body (Continued)
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19 |
3/4 Shift valve wedge |
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20 |
3/4 Shift valve plug |
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21 |
2/3 Shift valve |
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22 |
2/3 Shift valve spring |
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23 |
2/3 Shift valve plug |
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24 |
2/3 Shift valve wedge |
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25 |
Manual selector valve |
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26 |
Retainer ring |
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27 |
Manual selector valve rod |
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28 |
Fluid screens (x 4) |
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29 |
Valve B1 |
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30 |
Spring B1 |
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31 |
Wedge B1 |
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32 |
Plug B1 |
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33 |
Bridge valve |
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34 |
Bridge valve spring |
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35 |
Bridge valve wedge |
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36 |
Bridge valve plug |
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 Disassemble Disassemble valve body. Remove 4 fluid screens - small (2, 3, 4, 5), 1 fluid screen - large (1). | 
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Middle valve body by 180 ° Turn plate and remove seal. Lock balls (apart from 9), bypass valve with spring (3), non-return valve with spring (4). | 
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 Remove, Disconnect Valve B1 - press on plug (1), remove key (2) with magnet, remove plug, spring (3) and valve (4), if necessary assist with bent piece of electrode wire.
 Inspect Play-free seating of the valve in bore. Valve spring (3) for corrosion and deformation, measure valve spring, calliper gauge, free length: 29.7 mm, external diameter: 8.3 mm/0.32 in. | 
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Remove, Disconnect Bridge valve - wedge (1), plug (2), spring (3), valve (4), removal as for valve B1.
Inspect Same procedure as for valve B1, free length: 22.42 mm/1.4 in., outer diameter: 8.0 mm/0.3 in. | 
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Remove, Disconnect Primary regulation valve Wedge (1) - press with screwdriver on the sleeve (2). Remove sleeve (4), piston (5), spring (6), valve (7). Removal as valve B1, individual components in illus. D 0501.
Inspect Same procedure as for valve B1, free length: 29.72 mm/1.4 in., outer diameter: 10.5 mm/ 0.3 in. | 
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Remove, Disconnect Plug for neutral control. Bracket (1) - using small screwdriver, disengage from groove (D 0503/3) in plug, remove plug (2), if necessary tap slightly on wooden surface.
Inspect Play-free seating of plug in bore. | 
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Remove, Disconnect Remove 1/2 shift valve - wedge (1), plug (2), spring (3), valve (4), removal as for valve B1.
Inspect Same procedure as for valve B1, free length: 34.0 mm/1.4 in., outer diameter: 8.2 mm/ 0.3 in. | 
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Remove, Disconnect Remove 3/4 shift valve - wedge (1), plug (2), spring (3), valve (4), removal as for valve B1.
Inspect Same procedure as for valve B1, free length: 34.0 mm/1.4 in., outer diameter: 8.2 mm/ 0.3 in. | 
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Remove, Disconnect Remove 2/3 shift valve - wedge (1), plug (2), spring (3), valve (4), removal as for valve B1.
Inspect Same procedure as for valve B1, free length: 33.95 mm/1.3 in., outer diameter: 8.2 mm/ 0.3 in. | 
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If springs do not have identical values, or if play between piston/valves and the affected bore is too large, replace valve body (completely).
 Clean Removed parts, ducts and sealing surfaces of centre valve body, then blow dry and lubricate.
 Assemble Centre valve body. Always replace plate gaskets, fluid screen. Renew as needed lock balls, valves located under plates (bypass and check valves), selector slide and selector rod.
 Install, Connect Valve B1. Valve (4), spring (3), plug (1) in bore (arrow), press on plug and insert wedge (2) with magnetic lifter. |
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Install, Connect Bridge valve - valve (4), spring (3), plug (2) in bore, insert wedge (1). |
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Primary control valve - valve (5), spring (4), piston (3), sleeve (2) in bore (arrow), insert wedge (1). | 
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Install, Connect Plug for neutral control. Plug in bore (arrow), insert retaining bracket (1) in position (2) and snap into groove of plug (3). | 
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1/2 shift valve - valve (4), spring (3), plug (2) in bore (arrow), insert wedge (1). |
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Install, Connect 3/4 shift valve - valve (4), spring (3), plug (2) in bore (arrow), insert wedge (1). |
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2/3 shift valve - valve (4), spring (3), plug (2) in bore (arrow), insert wedge (1). |
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Assemble Centre valve body: Bypass-valve with spring (3); non-return valve with spring (4), all lock balls except plate No. 9. with new gaskets on sealing surfaces: Note the hole pattern of plate and gasket. | 
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Compress springs of bypass and non-return valves with plate, turn centre valve body over, lay aside on plate and weigh down so that lock balls remain in their installation positions. Insert 4 fluid screens - small (2, 3, 4, 5) and 1 fluid screen - large (1). |
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