Dolmar 420sc problem & various questions

[Stere]

I think the oil pump is knackered on my 420sc as its stopped oiling. Tried various things read on forums etc to unblock it but not luck.

 

Anyone dismantled one to acess the oil pump, from reading the repair manual seems pretty complicated? 

Maybe it didn't like veg oil. I have being using it  for  about 3 yrs with veg oil.

 

 

 

 

Also is the makita  ea4300f the exact  same saw in blue as the  dolmar 420sc?

 

Repair manual link:

 

https://www.manualslib.com/manual/834167/Makita-Dcs3500.html?page=2#manual

 

Quote

Note: Always use a new circlip 4

(927.408.000)!

 

Why the need for new circlips?

 

 

 

 

 

 

 

 

 

 

 

[Ian Leach]

@shavey

Will be able to help.

[shavey]

Yeah they don’t usualy pack up on these saws and it’s very difficult to get the repair kits now  the new oil pump is approx £30-£33+VAt part number 

Is 161346-0  they are the same saw as the makita ea4300

its not too difficult to do the pumps in these it can get a bit messy after using veg oil in behind the clutch and drum

 

its always good practice too put a new 99p circlip on after removing it a couple of times once they become weak,  they’ll come off and get lost 

[Stere]

Thanks shavey

 

 

Iv'e found some parts cheap on a  different model saw, but they look the same in diagram & *OIL PUMP ADJUSTMENT SET PS32 thing is only £1.20. plus P&P

 

http://www.powertoolspares.com/tool/makita/spares-and-accessories-for-ea3201s/ea3201s/spares/

 

Worth a punt?

 

Oil pump complete is listed  fitting for both models here:

 

https://www.kettensaegen-saegeketten.de/8782/oelpumpe-fuer-dolmar-motorsaege-ps-32-ps-35-ps-350-ps-420-ps-460-ps-500-ps-6100...-auch-fuer-makita-dcs-3500-dcs-3501-dcs-4300-dcs-4301...

 

So is that the bit that  may normally need replacing?

 

 

 

 

[Sawchip]

Something to be sure of....Check to see if the worm drive driven by the clutch and the drive on the pump spindle is ok and actually being turned .  

Edited January 13, 2018 by Sawchip

[billpierce]

If you have left veg oil in there unused for a while it could well have set hard.....have you taken the pump off and soaked on petrol or brake cleaner?

[Stere]

Hi can't get the clutch off with pliers. Looks like I might need to try make my own a tool or buy the special dolmar tool. Tool is about 35 euro

 

Length of plate with 3 screws?

 

 

 

[billpierce]

Google it. If it's outboard you can stuff starter cord on the spark plug hole and knock it with a brass drift. Will be opposite thread to normal.

Maybe you already tried? Stick a pick up

[Stere]

 

 

Quote

stuff starter cord on the spark plug hole

Did that & tried to unscew with pliers

 

pic from internet:

 

 

[billpierce]

It'll need a tap with a brass drift or similar then. Will be too tight to undo with pliers I expect