Discussion:
Hydraulics??? Novice

Real novice here.
I let the hydraulic fluid get real low. Just added 2 gallons but the symptoms are the same;
Will go forward and reverse - no problem.
Tilt works.
Will raise or lower - once per hour and then..... When I want to lower, without pushing tilt button it tilts forward. When I want to raise it gives a high pitched vibrating, buzzing / noise and nothing happens. The source of the 'buzz' is hard to pinpoint - maybe the red 'thing' under the key. I was hoping pouring in fluid would fix this - please help.

To clarify - if I wait an hour or so it will go through 1 lift / lower cycle and then freeze up. By freeze up, I mean without pushing the tilt button, if I push to lower it tilts down and if I pull back to raise it buzzes.
  • Posted 16 Feb 2015 07:19
  • Modified 16 Feb 2015 10:45 by poster
  • By davidca
  • joined 10 Aug'11 - 3 messages
  • California, United States
Showing items 1 - 4 of 4 results.
L/O Box is "lockout box" Inside are your relays for your function controls. It is located just to the fork side of the SCR panel.

A solenoid valve is an electromagnetic valve that opens and closes; in this case allows (open) and shuts off (closes) hydraulic pressure flow depending on selection from the operator controls.
  • Posted 5 Apr 2016 04:40
  • Modified 5 Apr 2016 04:41 by poster
  • By chevotaman
  • joined 28 Feb'14 - 112 messages
  • Texas, United States
It's all just nuts n' bolts.
At that time - I replaced the hydraulic filter and added fluid and it has worked fine --- until recently. Now doing same thing. I have filled fluid so that it just today overflowed but have not changed the filter again.
To be honest I've never changed the fluid completely....I don't know what a SOL Valve or L/O box is.
Can you give a little more advise and I do think I could figure this out.
I'm afraid to call for repair because of bad (lieing) experience a few years ago and I don't know that anyone around here has any experience with this type machine.
THANKS!
  • Posted 25 Mar 2016 10:12
  • By davidca
  • joined 10 Aug'11 - 3 messages
  • California, United States
check the tilt switch button. if it is faulty it will think you still want to tilt instead of lift
  • Posted 22 Feb 2015 06:57
  • By popeye
  • joined 24 Nov'14 - 208 messages
  • Ohio, United States
Sounds like sol valve sticking or an issue in the L/O box to me.
  • Posted 17 Feb 2015 02:40
  • By chevotaman
  • joined 28 Feb'14 - 112 messages
  • Texas, United States
It's all just nuts n' bolts.

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Tusk 350CGH20
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
UN Forklift FGL18T
HANGZHOU, Zhejiang, China
New - Sale
Global Industry News
edition #1236 - 26 June 2025
As June comes to a close, the month when our sector recognises National Forklift Safety Day , the United Kingdom’s Association of Industrial Truck Trainers (AITT) has issued a timely reminder of the need to ensure any staff training is fully accredited... Continue reading
Fact of the week
Sourdough bread contains Lactobacillus reuteri, a probiotic bacteria. During pregnancy and breastfeeding, these bacteria can travel from the mother's colon to her breast tissue and be passed to the infant through breast milk. It offers various health benefits, including potential protection against breast cancer.
Fact of the week
Sourdough bread contains Lactobacillus reuteri, a probiotic bacteria. During pregnancy and breastfeeding, these bacteria can travel from the mother's colon to her breast tissue and be passed to the infant through breast milk. It offers various health benefits, including potential protection against breast cancer.
Upcoming industry events …
July 9-10, 2025 - Birmingham, United Kingdom
October 21-23, 2025 - Panama City, Panama
Latest job alerts …
Evansville, IN, United States
Daleville, IN, United States
Uxbridge, Canada
St. Louis, MO, United States