I bought a 1989 GMC Topkick bucket truck today. The previous owner thinks the boom is probably an Altec.
I want to change the hydraulic oil and filter. What grade of hydraulic oil do I need. In case the boom is not an Altec, do all brands use the same grade hydraulic oil.
I want to change the hydraulic oil and filter. What grade of hydraulic oil do I need. In case the boom is not an Altec, do all brands use the same grade hydraulic oil.