Sliding door lubrication recommendations?

djgelb

New member
Good afternoon! I have a 2003 Freightliner 3500 140 dually and the sliding door is a little sticky. You have to yank it pretty hard initially to open it and it does not slide smoothly from there. It does close nice and straight without having to slam it. Does anyone have recommendations on a lubrication routine or other suggestions for making it easier to open and close the sliding door? Thank you in advance.
 

lobsta

Active member
Cleanliness is usually a good start.
Are your slide rails all gummed up with murk..?
Since they are pretty exposed, there have been instances where folks spilled stuff (say fizzy drinks or juice) which then wen to gum up the mechanisms and cause you the said grief.
After you are all cleaned up, try some moly-slip.. in not-so-mad quantities.. :)

Good afternoon! I have a 2003 Freightliner 3500 140 dually and the sliding door is a little sticky. You have to yank it pretty hard initially to open it and it does not slide smoothly from there. It does close nice and straight without having to slam it. Does anyone have recommendations on a lubrication routine or other suggestions for making it easier to open and close the sliding door? Thank you in advance.
 

Thanasis

Active member
I think the difficulty in initiating the closing of the door is no a matter of insufficient lubrication. For safety reasons, the door mechanism is designed so that the door would stay open even if the van is parked downhill.
 

lobsta

Active member
The lad / lass explicitly cited difficulty during opening the door.
What you are referring to is the end-stop latch holding mechanism that - as you said - will hold the door until you release it by either the inboard or outboard door handles - same action that you'd take when opening.. :)

I think the difficulty in initiating the closing of the door is no a matter of insufficient lubrication. For safety reasons, the door mechanism is designed so that the door would stay open even if the van is parked downhill.
 

lobsta

Active member
I'd check the handle itself for dirt and old grease.. then the lock / latch assembly would also be a good place to check.
If you are not well tooled, you can just go HAM with some penetrating oil (WD40) into the latch orifices to let it soak up and see if it gets better.
Here are some images of the unit removed from the door. You need some tooling to get it out.. but what you will need more of.. is grace and patience.. :D

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djgelb

New member
Thanks so much lobsta and others! I will start with taking a closer look, and then some serious lubrication as recommended.
 

glasseye

Well-known member
It will always require a firm yank to get it started rolling closed.
If it makes grinding noises while rolling closed, the track needs cleaning, not lubrication. Pull the scuff plate and inspect.
The roller exposed during the inspection might need a drop or two of oil, but the track needs none.

 

pjstock

Member
It will always require a firm yank to get it started rolling closed.
If it makes grinding noises while rolling closed, the track needs cleaning, not lubrication. Pull the scuff plate and inspect.
The roller exposed during the inspection might need a drop or two of oil, but the track needs none.

where or what is the Scuff Plate please?

but my grinding noise is coming from the EDIT: "Middle" track not the lower track (I didn't realize there are actually three tracks)
 

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glasseye

Well-known member
Scuff plate is the plastic piece over the door vestibule, the one you step up on as you enter. The screws that retain it are very hard to see, hidden under square plastic plugs 1 cm or so in size. Five, I think.

Your upper track may have debris, too. They gotta be clean.
 

pjstock

Member
Scuff plate is the plastic piece over the door vestibule, the one you step up on as you enter. The screws that retain it are very hard to see, hidden under square plastic plugs 1 cm or so in size. Five, I think.

Your upper track may have debris, too. They gotta be clean.

but again, my grinding sound is definitely coming from the middle track. (waist height)
could that be related to a dirty lower track?
 

hkpierce

'02 140 Hi BlueBlk Pass
If it is the middle track, that track and roller is visible looking from the correct angle. But you initially said the upper track. So if you are not sure, I would recommend removing the door, check all the roller hardware, and clean out the lower track. Multiple posts and pictures on several of these (Advanced Search in the upper right of your screen) operations - including one of my own where I was financially rewarded from some of the debris I pulled from the lower track!
 

ECU

2006 T1n 118 Sprinter
That would be issues with the middle track. Gunk or worn roller. Clean the track. Note where it actually contacts the track.
I've used garage door lubricant. But look where you'd actually need to put it sparingly. Extra grease will make a mess down the side.
 

pjstock

Member
If it is the middle track, that track and roller is visible looking from the correct angle. But you initially said the upper track. So if you are not sure, I would recommend removing the door, check all the roller hardware, and clean out the lower track. Multiple posts and pictures on several of these (Advanced Search in the upper right of your screen) operations - including one of my own where I was financially rewarded from some of the debris I pulled from the lower track!
my error. that was typo (now corrected)
(I didn't notice there were actually three tracks: upper, middle and lower. but of course there has to be)
 

glasseye

Well-known member
If it is the middle track, that track and roller is visible looking from the correct angle. But you initially said the upper track. So if you are not sure, I would recommend removing the door, check all the roller hardware, and clean out the lower track. Multiple posts and pictures on several of these (Advanced Search in the upper right of your screen) operations - including one of my own where I was financially rewarded from some of the debris I pulled from the lower track!
What reward? And how much? 🤪
 

hkpierce

'02 140 Hi BlueBlk Pass
A CND dollar
 

ECU

2006 T1n 118 Sprinter
What reward? And how much? 🤪
I spilled a bag of quarters down the step. I'm sure some must remain.
I opened up my step once. Apparently, I had spilled a bucket of paint that some had gone down behind the step.
The dried paint was a quarter inch thick. Screws and other things stuck in the latex. Of course the drain hole was clogged.
These days, I clean it out once and a while with the magnet on a stick.
But the magnet didn't work on US quarters...
 

p3424

Active member
Use engine oil
If you want to be fastidious use none-detergent oil so the dirt and grime gets pushed aside instead of suspended; Lube at least once a year. Grease might last longer but good luck getting it into all the hinges and bearings of the three rails. While you are at it you might as well do all the doors, latches, lock cylinders (use silicon spray not oil)
 
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