JLG 600SC_660SJC Service Manual - Manual (Page 138)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
5-46 – JLG Lift – 3121157
Roller bearing (3) / Roller
bearing (28) When flaking and abrasion develop on
rolling surface *** *** Roller bearing
When indentation is found on rolling sur-
face *** ***
When abnormality is found in rotation
(abnormal noise, irregular rotation) *** ***
Piston sub assembly (15) When remarkable flaws or high surface
roughness are found on each sliding
surface *** *** Piston sub assembly / Case
When clearance to case is great 0.020 0.040
When looseness in shoe ball parts is
great 0.5 1.0
Steel ball (6) When seizure is found on contact sur-
face with swash plate (9) *** *** Swash plate/ Steel ball
Plunger (33) When clearance to base plate (2-1) is
great 0.020 0.060 Base plate sub assembly
Base plate (32) When remarkable flaws or high surface
roughness are found on sliding surface *** *** Base plate sub assembly
When flaws which may cause oil leaks
are found *** ***
Spool (39) When remarkable flaws or high surface
roughness are found on sliding surface *** *** Base plate sub assembly
When clearance to base plate (32) is
great 0.025 0.050
Poppet (57) When remarkable flaws or high surface
roughness are found on sliding surface *** *** Base plate sub assembly
When clearance to base plate (32) is
great *** ***
When remarkable flaws or high surface
roughness are found on seat surface *** ***
When breakage or deformation is great Free length Each spring
Spring (9) 52.2 50.7
Spring (22) 37.7 36.2
Spring (25) 24.0 22.5
Spring (35) 51.7 50.2
Spring (40) 40.0 38.5
Spring (58) 45.0 43.5
Parts Name Appearance Standard Value Allowance Replacement Parts