• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

JLG 450 Series 1 Engine Won't Come Off Idle

agftemp

New Member
Joined
Mar 26, 2023
Messages
1
Location
michigan
I recently bought a 1999 450AJ boom lift to do work on my house. After a couple of days use, the engine would not consistently raise speed when pressing the foot switch. Sometimes it took a couple of tries, but the engine would go to high speed.

Now when pressing the switch, the engine stays at idle, no matter how many times I retry it. The green foot switch light comes on, and all the functions work, but everything is just slow because the engine speed is slow.

Any suggestions as to what is wrong?
 
Top