SUPPORT-TRUNNION 8R8469 - Caterpillar

Illustration 1 g00637675
Selector Valve (1) Valve body (2) Valve spools
Table 1
Spool Positions for the Selector Valve    
Positions of Spools (End (A) from Face (B) )     Direction and Speed     Engaged Clutches    
The position is inward: 12.4 mm (.49 inch)     REVERSE     2 and 4    
Flush     NEUTRAL     3    
The position is outward:
13.2 mm (.52 inch)     Forward FIRST     2 and 5    
The position is outward:
26.4 mm (1.04 inch)     Forward SECOND     1 and 5    
The position is outward:
39.4 mm (1.55 inch)     Forward THIRD     2 and 3    
The position is outward:
51.8 mm (2.04 inch)     Forward FOURTH     1 and 3    Spools (2) are connected to the spool of the shift cylinder by linkage. When the shift cylinder moves, the shift cylinder moves spools (2). Spools (2) allow oil to go to the clutches. The spools open and the spools close the passages to the clutches in valve body (1).