JLG 4017 Parts Manual - Manual (Page 126)

ENGINE & ATTACHING PARTS
4017 3121859 4-40
Figure 4-19 Four Speed Transmission - Electric Control Group (Continued)
S/N 1160000533 & After including 1160000516,
1160000517, 1160000520 & 1160000223 thru
1160000531