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Trying to check injection pump timing on a mack with a ambac…

Customer Question
trying to check injection pump...
trying to check injection pump timing on a mack with a ambac pump model 300 plm450412
Submitted: 8 months ago.Category: Medium and Heavy Trucks
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Answered in 20 minutes by:
11/21/2017
Technician: Daniel Wilson,
 replied 8 months ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,885
Experience: Owner at DJ Wilson
Verified

Hi Mark, It is Dan. What troubles/symptoms are you having with this engine that is timing related? No start condition with good fuel delivery?

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Technician: Daniel Wilson,
 replied 8 months ago

In the meantime here is some service literature for that pump

Specs/Repair

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Technician: Daniel Wilson,
 replied 8 months ago

What is the engine model and serial number? What year and chassis model truck is this in?

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Customer reply replied 8 months ago
it is in a rd688 engine sn is 11gb21886p3 and my problem is even after putting new injectors in the truck still goes up in smoke art higher rpms
Technician: Daniel Wilson,
 replied 8 months ago

What color smoke are you getting?

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Technician: Daniel Wilson,
 replied 8 months ago

See PDF page 44 in the publication I sent.... There was a bulletin on your engine.

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Technician: Daniel Wilson,
 replied 8 months ago

I recommend doing the plungers and barrels to resolve this issue.

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Customer reply replied 8 months ago
smoke is blishish white definatly fuel
Customer reply replied 8 months ago
I just want to verify pump timing before I have it rebuilt
Technician: Daniel Wilson,
 replied 8 months ago

With an inline pump there is two ways when its not a pinned pump... dial indicate with the dial indicator on #1 plunger and barrel or spill timing which is most common. Click below

Spill timing

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Technician: Daniel Wilson,
 replied 8 months ago

Also, This method works on all inline pumps

Timing

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Technician: Daniel Wilson,
 replied 8 months ago

Hi, Did you get this resolved? Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated.

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