19-021 SRP

Fuel Tank Fill System – Non or Slow Filling
Bulletin Type:
SRP
Bulletin #(s):
Publication Date:
January 2021
19-021
Make(s):
Jayco Towable
Job Code(s):
**
Model(s):
Seismic FW
Talon FW
Flat Rate(s):
**
Model Year(s):
2017-2019
** If affected unit has warranty remaining, submit your
claim following the normal process.
Incident:
Affected Units:
Parts List:
Misc. Tools & Supplies:
Fuel Tank system is slow filling or not able to be filled.
Certain Jayco towable Seismic or Talon FW units that are built with
the fuel tank fill system.
Part A- All parts obtained from a local supplier or service stock.
See itemized parts list on page 2 of instructions.
Part B- Ball Check Valve is Jayco part # 0322725.
Only replace if ball check valve is a Reject. See page 7 of instructions.
Cordless Drill/Driver
3/8” socket
Torque Wrench
INSTRUCTIONS – PART A & B
PART A
Problem:
Some fuel tank fill systems of sport utility fifth wheel trailers with 10-inch I-beams have experienced slow filling or
not being able to be filled due to inadequate slope of the fill hose from the fill neck outlet to the tank inlet.
This may be used on models with 12-inch I-beams to obtain additional slope of the fill hose from the fill neck outlet
to the tank inlet.
Remedy:
Increase the slope of the fill hose(s) from the fill neck outlet to the tank inlet by lowering the fuel tanks.
SRP 19-021 – Fuel Tank System Non or Slow Filling
January 2021
Page 1 of 7
Itemized Parts List:
 (1) 1 X 2 X 27.5” Steel Tube;
o For spacing across top of fuel generator tank
 (1) 1 X 2 X 25” Steel Tube;
o For spacing across top of fuel station tank
 (13) 1-3/16” spacers
o Use (12) between bottom of frame cross member & fuel tank braces across bottom of fuel tanks
o Use (1) between tank bonding tab & trailer frame cross member
 (12) 3/8 – 16 X 2-1/2” gr. 5 Hex Cap Bolts
o Replaces all existing 1-1/2 bolts
 (24) 3/8 Flat Washers
 (24) 3/8 Lock Washers
 (2) ¼” X 2” Washer head Hex Cap TEK Screw
o Replaces existing tank bonding screw @ each tank
 (2) ¼” Flat Washers
o For under screw head of tank bonding screw @ each tank
Instructions:
NOTE: The fuel tanks may be lowered WITHOUT complete removal and reinstallation of either tank.
1. Begin with the Front tank.
a. Remove the ¼” X 1” washer head hex cap TEK screw at the tank-bonding tab.
b. Loosen each of the bolts at the tank support brackets across the bottom of the tank – DO NOT
REMOVE the bolts.
i. This will allow the tank to lower resting on the support brackets.
c. ONE BY ONE remove each bolt at the tank support brackets across the bottom of the tank place a
spacer between the frame cross member and the tank support bracket.
i. Using the new 2-1/2” bolt, flat washer and lock washer insert through the bracket and
spacer into the tinnerman nut on the cross member.
1. Do not fully tighten the new bolt.
2. Run the bolt only far enough for about (2-3) threads past the end of the tinnerman
nut on the cross member.
ii. Repeat for each end of each bracket until all bolts, flat washers, and lock washers have
been replaced.
1. The tank should be lower by more than one (1) inch.
d. Reach across the top of the tanks place the 1 X 2 X 27.5” steel tube (laid flat) on the top of the tank.
i. Ensure the tube is on the tank top and under two of the three steel straps of the trailer
frame.
ii. Work the tube to be positioned cross -way to get part of the tube under the flange of the
trailer cross members at both sides of the tank.
iii. Keep clear of wires and the sending unit on top of the tank.
e. With the tube in place at the top of the tank and all new bolts, washers, and bottom spacers in
place tighten all bolts at the bottom brackets.
i. Final torque 35 ft. /lbs.
2. Back tank
a. Repeat the steps followed in 1.a-c for the front tank.
b. Use the 1 X 2 X 25” steel tube (laid flat) on the top of the tank. See step d. i.-iii for the front tank.
SRP 19-021 – Fuel Tank System January 2021
Page 2 of 7
Non or Slow Filling
c. With the tube in place at the top of the tank and all new bolts, washers, and bottom spacers in
place tighten all bolts at the bottom brackets.
i. Final torque 35 ft. /lbs.
3. The slope of the fuel fill hoses should now be at least 1 to 1-1/4-inch lower at the tank inlet than at the fill
neck outlet. This will allow filling at full nozzle delivery pressure.
Note: the fill nozzle may not necessarily be fully inserted with the spring on the nozzle contacting trailer’s fill
opening.
SRP 19-021 – Fuel Tank System Non or Slow Filling
January 2021
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SRP 19-021 – Fuel Tank System Non or Slow Filling
January 2021
Page 4 of 7
PART B
Two Issues:
1. Ball check valve retainer is deformed, restricting the ball valve. Replace ball check valve.
2. Ball check valve assembly is incorrectly located in the fill neck. Reset ball check valve in correct location.
The check ball may have slid into the fill neck, allowing the fingers of the ball check valve to compress and push into
the tank opening.
The first 2 photos depict what you would see on a normal tank from inside the tank and also the front of the
tank. This is what is considered a good/normal install which will allow fuel to flow with no issues. The check ball
should move freely with the confines of the three prongs.
1
2
Photos 3-5 show the ball check valve fingers have become compressed and pushed or inserted into the tank
opening which is restricting the ball movement and causing the slow fill. The photos depict the worst case scenario,
showing the maximum amount the ball valve can be pushed into the tank.
3
SRP 19-021 – Fuel Tank System Non or Slow Filling
4
5
January 2021
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Photo 6-7 are of the ball check valve assembly. Jayco part # 0322725.
6
SRP 19-021 – Fuel Tank System Non or Slow Filling
7
January 2021
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The ball should move freely with the confines of the three prongs.
Accept
Reject
Accept
SRP 19-021 – Fuel Tank System Non or Slow Filling
Reject
January 2021
Page 7 of 7