MANIFOLD AS-PUMP 7G6786 - Caterpillar

Illustration 1 g02331093
Table 1
Group Part Number    Group Name    New Spool Number    Former Spool Number    
259-7632     Control Valve Gp     352-7245     259-7544    
285-1340    
285-1371    
285-1595    
310-0426    
352-6858    
239-8825     Control Valve Gp     352-7246     239-8829    
285-1344    
270-5635     Control Valve Gp     352-7247     259-7726    
285-1352    
352-6856     Control Valve Gp     352-7248     259-7856    
352-6857     Control Valve Gp     352-7249     190-7709    The hydraulic system warm-up procedures should always be followed as stated in the machine Operation and Maintenance Manual. Operating a machine prior to completing these procedures can result in valve spools sticking or seizing, affecting the machine operation. The clearance between the stem and the valve bore of the stick regeneration valve has been changed. This change reduces the chance of the valve sticking if the machine is operated prior to the completion of the hydraulic system warm-up procedures stated in the Operation and Maintenance Manual.In order to increase the tolerance between the spool and the valve bore and prevent sticking, change the spool as listed in Table 1.