555 exhaust manifold project

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Jim B
350 crawler
350 crawler
Posts: 2072
Joined: Sun Nov 05, 2017 11:36 am
Location: western Maine

Re: 555 exhaust manifold project

Post by Jim B » Sat Dec 29, 2018 7:10 pm

Hi Nick,

Glad the Parts Advisor route worked for you.

The 450E manual (TM1330RE) shows 47n.m (35 ft.lb.) for the 3/8 manifold to head capscrews and the same for the 3/8 bolts that mount the turbo and elbow to the manifold. That is the same torque shown in the torque specs in the manual's general info section for dry grade "D" hardware. (Their "D" is grade 5, 3 hash marks on the head. Grade "F" is Grade 8 having 6 hash marks. Guess the industry standard terms aren't good enough for them.) Most manufacturers recommend reducing the dry torque by about 25% for lubricated, so 25 ft.lbs. would put you in the Grade 5 lubed range, by common practice. If you used Grade 8 capscrews the dry torque for Grade 8 was 50 ft/lbs., so 38 ft.lbs. lubed. You will be fine where you're at, I believe. How many 3/8 capscrews/bolts get tightened with out a torque wrench and how many of those are torqued more than the charts show?

Jim

ngilles
420 crawler
420 crawler
Posts: 43
Joined: Sat Aug 25, 2018 11:47 am
Location: Western WI

Re: 555 exhaust manifold project

Post by ngilles » Sat Dec 29, 2018 7:37 pm

Jim,
You're right, though I've overtightened on the "spec", how many things have we tightened without a torque wrench ? :)
Again, I sure appreciate your help. Should get the turbo bolted on soon, need a couple hose clamps and a chunk of oil return hose for the turbo return line. Off to the JD dealer on Monday.
I'm sure I'll be back soon :lol:
Nick
JD 555 "Triple Nickel" (straight 555) Trackloader
Lx565 New Holland Skid Loader
D14 Allis Chalmers 1959

B Town
350 crawler
350 crawler
Posts: 752
Joined: Fri Dec 11, 2015 7:04 pm
Location: Western Iowa

Re: 555 exhaust manifold project

Post by B Town » Sat Dec 29, 2018 7:51 pm

It is my experience the adapter (R43724 I believe) between the turbo exhaust and elbow is often worn out. This adds to noise and exhaust under the hood. You have come this far on this project, it might be worth replacing will you are in it. Best regards, Bruce

ngilles
420 crawler
420 crawler
Posts: 43
Joined: Sat Aug 25, 2018 11:47 am
Location: Western WI

Re: 555 exhaust manifold project

Post by ngilles » Sun Dec 30, 2018 7:55 am

Thanks B Town,
I've not bolted the turbo down yet, going to replace a couple hoses and clamps, They're pretty "crunchy". Thanks for the tip on the adapter, I'll take a close look at it. It appears solidly sealed/attached to the turbo, no movement at all visible between parts.
Have a great New Year,
Nick
JD 555 "Triple Nickel" (straight 555) Trackloader
Lx565 New Holland Skid Loader
D14 Allis Chalmers 1959

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