JLG 600SC_660SJC Service Manual - Manual (Page 139)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
3121157 – JLG Lift – 5-47
Reduction Gear Maintenance
NOTE: Pitching in this instance refers to a case where pitching occurs in more than 10% of engagement area per tooth surface.
Parts Name Appearance Standard Value Allowance Replacement Parts
Drive gear (1-22) / Sun gear
B (1-15) / Housing (1-6) When pitching (note 1) and abrasion
develop on gear tooth surface *** *** Drive gear (1-22) / Sun gear
B (1-15) / Housing (1-6)
Planetary gear A (1-18) /
Planetary gear B (1-9) When pitching (note 1) and abrasion
develop on gear tooth surface *** *** Planetary gear A (1-18) /
Planetary gear B (1-9)
When flaking and abrasion develop on
rolling surface of needle bearing *** ***
Needle bearing (1-19) / Inner
race (1-20) / Needle bearing
(1-10) / Floating bushing (1-
11) When flaking and abrasion develop on
needle and rolling surface *** *** Needle bearing (1-19) / Inner
race (1-20) / Needle bearing
(1-10) / Floating bushing (1-
11)
When indentation is found on needle
and rolling surface *** ***
When abnormality is found in rotation of
bearings (abnormal noise, irregular
rotation) *** ***
Thrust washer (1-12) 3.5 3.4 Thrust washer (1-12)
Thrust plate (1-23) 2.6
3.0
3.4 2.5
2.9
3.3 Thrust plate (1-23)
Ring nut (1-4) When replaced Ring nut (1-4) / Plug (1-5)
Floating seal (1-2) When flaws that may cause oil leaks
develop on sliding surface Floating seal (1-2)
Thrust plate (1-13) When remarkable deformation is found 6 5.6 Thrust plate (1-13)