Toyota 42-6FGCU25:
Differential Fill and Drain Plugs

I want to drain and fill the differential.

At the front of the differential is a plug with a square recess. Is this the fill plug and should oil be filled to the bottom of this hole? What is puzzling to me is that all the differentials I have encountered take oil to a level just above the bottom of the axle tubes, and therefore below the centre line of the differential. This plug is above the centre line, so the differential will be more than half full of oil if filled up to this plug.

There is another plug further up that has a hex recess, thus taking an allen key. What is this plug for?

I did not jack up the forklift, so I did not see the bottom of the differential. Feeling under the differential, there are two plugs located at the back and towards the bottom of the differential. These have hex heads on them, thus taking an ordinary wrench. Is one of these the drain plug?
  • Posted 19 Oct 2016 08:06
  • Modified 21 Oct 2016 09:06 by administrator
  • Discussion started by Georg
  • Ontario, Canada
1998 426FGCU25 Ser No 67740
Showing items 1 - 2 of 2 results.
Well, I will answer my own questions. I lifted the forklift today and found the drain plug at the very bottom of the differential case. The fill plug is the one at the front of the differential. They are both 1/2 in square recess and can be driven with a 1/2 in extension on a ratchet.

The oil level is to be at the bottom of the fill port.. The fluid capacity of the differential on my truck is 6.4 l and adding that amount after draining the old oil brought the level up to the bottom of the fill port.

I used 75W90 Spirax by Shell.
  • Posted 12 Jan 2017 10:40
  • Reply by Georg
  • Ontario, Canada
From Admin....Sorry again, it appears I got the link copied incorrectly last time as well. Here is a new link to the photo, at photobucket dot com that applies to this post.

http://i299 dot photobucket dot com/albums/mm318/george7941/100_0817.jpg
(just change both of the "dot" to a ".")
  • Admin
  • Posted 21 Oct 2016 09:20
  • Modified 21 Oct 2016 09:22 by poster
  • Reply by Admin
  • Queensland, Australia

Post your Reply

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Having trouble using the Discussion Forums? Contact us for help.

Hangcha CBD15
China
Used - Sale
USD1,600
Hitachi HX64B2
Yokohama, Japan
Used - Sale
Upcoming industry events …
June 17-19, 2025 - Rotterdam, Netherlands
August 29, 2025 - Boksburg, South Africa
October 15-17, 2025 - Singapore, Singapore
Latest job alerts …
Johnston, IA, United States
Jefferson, WI, United States
St. Louis, MO, United States
Fact of the week
The Michelin Guide with its star rating system originated in France in 1900. The guide was created as a marketing tool to encourage more car travel and consequently increase the demand for tyres. It initially contained maps, tire repair instructions, and lists of restaurants, hotels, and mechanics.
Movers & Shakers
Manojit Acharya Manojit Acharya
APAC vice president, Jungheinrich
Senior VP direct sales and marketing, Daifuku Intralogistics America
Regional sales manager for Malaysia and Singapore, Libiao Robotics
Area sales manager - Spain, Trex Parts
Toplift Ferrari TFC36-48
Stoney Creek, Ontario, Canada
Used - Sale
USD1
Hangcha CBD15
China
Used - Sale
USD1,600
Global Industry News
edition #1234 - 12 June 2025
As a journalist focussed on the materials handling sector, it is difficult not to notice the regularity of news stories that detail injuries to – or worse still the deaths of – forklift operators... Continue reading
Fact of the week
The Michelin Guide with its star rating system originated in France in 1900. The guide was created as a marketing tool to encourage more car travel and consequently increase the demand for tyres. It initially contained maps, tire repair instructions, and lists of restaurants, hotels, and mechanics.