hitachi — MAINTENANCE STANDARD

UPPERSTRUCTURE / Pump Device MAINTENANCE STANDARD Allowable Limits for vulnerable Parts 1. Clearance between plunger (32) outer diameter (d) and cylinder block (27) bore diameter (D). D-d Unit: mm (in) d D Standard Allowable Limit 0.038 (0.001) 0.078 (0.003) W117-02-02-009 2. Free length (L) of cylinder spring (28) L Unit: mm (in) Standard Allowable Limit 40.9 (1.61) 40.1 (1.58) 3. Clearance (e) between plunger (32) and shoe (31) bottom and shoe (31) thickness (t) e Unit: mm (in) L W117-02-02-010 t Unit: mm (in) Standard Allowable Limit t e 5.4 (0.21) 5.0 (0.20) 4. The difference between the surface of retainer (30) to the top of spherical bushing (29) H-h Unit:

mm (in) W117-02-02-011 Base 13.5 (0.53) 12.5 (0.49) Standard Allowable Limit h H W117-02-02-012 W2-4-37 Standard Allowable Limit 0 to 0.1 (0 to 0.004) 0.35 (0.014)