ACMOC
Login
ACMOC
D4 fuel transfer pump

D4 fuel transfer pump

Haus
Topic Author
Offline
Member
Send a private message to Haus
Posts: 83
Thank you received: 1

Is there a new number for 1F5471 (the seals)?

I'm chasing both diesel leaking into the crank case and also trying to improve fuel pressure.

I'm hoping a new bypass spring will help with fuel pressure.

Paul.

Please log in or create an account to join the conversation.
Fri, Jun 12, 2026 8:56 PM
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I became a member recently because the wealth of knowledge here is priceless." 
-Chris R

Join Today!