11 base frame components troubleshooting, Caster wheels not operating freely, Check for these obvious conditions first – JLG 20VP (3120728) Service Manual User Manual

Page 102: Is machine operating on a smooth, level surface, Table 3-32. caster wheels not operating freely, Pot hole protection (php) bars will not set, Base frame components troubleshooting -42, Caster wheels not operating freely -42, Pot hole protection (php) bars will not set -42