6. What is the best way to determine which water pump kit is required?

 7. In 300 series engines, what does "O-ring in the block" versus "O-ring on the liner" mean?

 8. What is the difference between borable and honable connecting rod bushings?

 9. What is an underhaul kit?

 10. What is a 400 series replacement block?

 11. My customers 400 series engine main bearing journals have two drilled holes, but the Reliance bearings that I supplied him only has one oil hole. Are the bearings mispackaged?

 12. My customer's 6-404 engine only has one O-ring groove in the block. Which O-ring should he use?

 13. Why do the connecting rod bolts (capscrews) and cylinder head bolts need to be replaced every time they are loosened in Deer & Company® engines?

 14. Where do the thrust washers fit in the engine?



 1.Why do some Reliance part numbers differ from  John Deere®?

 Occasionally, John Deere® uses the same part in engines produced at two engine  plants. In some cases, John Deere® has assigned different part numbers for the same  part. In those cases, Reliance uses the part number that is most widely used.

 Where Reliance offers a kit, part or assembly that John Deere® does not, Reliance  utilizes an RP(Reliance Part) number. One example of this is our 531 cylinder kit. We sell it  under a RP part number because John Deere® only offers 531 pistons, pins, rings,liners  and O-rings separately. They do not offer 531 cylinder kits                                                                  Top

  2.Can I use the Litre version 3029, 4045 and 6068 Overahaul Kits in the 2.9, 4.5 and 6.8 Powertech Engines?

No. See Parts and Service Bulletin 100-7 Identifying Powertech Engines                            Top

  3.What is the difference between the two oil pump drive gears that
 are listed for the early 6-404?

 If your customer has a separate shaft and gear, he can purchase the NR-32428 gear only.  However, if the shaft is worn, or if the customer has the one piece shaft and gear assembly, it  should be replaced with NR-45134. New shafts used with NR-32428 gears are not available  from Deere & Company® or Reliance.                                                                            Top

  4.My customer has a 4-219T (turbocharged) engine. The Reliance catalog does not list  turbocharged cylinder kits for the 4-219. Can I sell him Reliance kits?

 Yes. When an engine application in the Reliance catalog does not list any suffix,  (e.g.:D,T,A,H), that parts or kit will work in all engine configurations.                                 Top

  5.Reliance 300 series camshafts utilize a threaded tachometer drive, but my customer's old  cam has a press-in tachometer drive. Can he use a Reliance cam?

 Yes. When utilizing the Reliance 300 series camshaft, either a threaded shaft, slotted-type or  a threaded shaft, helical gear type tachometer drive must be used.

 Reliance offers both of these tach drives. NR-81513 is the slotted type, and NR-81514 is the  helical gear type tachometer drive shaft. In all cases, press-in tach drives must be replaced  with thread-in tach drives when using Reliance camshafts.                                               Top

  6.What is the best way to determine which water pump kit is required?

 The most accurate way of determining the appropriate water pump overhaul or reconditioning  kit is to obtain either the water pump housing casting number or the equipment application.  Deere & Company® utilizes many different water pumps. The correct kit is dependent upon  application. For 300 series water pump applications, refer to the Application by Water Pump  Housing Number Table in section 5.10 of the Reliance catalog.                                        Top

  7.In 300 series engines, what does "O-ring in the block" versus "O-ring on the liner" mean?

 Deere & Company® produced some early cylinder blocks that have a smooth lower bore. In  these blocks, the cylinder liners are machined to accept the O-rings. Later blocks have the  O- ring grooves machined in the bore, and the liners for those blocks are smooth. Block  casting numbers for O-ring on the liner blocks are listed in the 1.60 cylinder kit section of the  Reliance catalog.                                                                                                         Top

  8.What is the difference between borable and honable connecting rod bushings?

 A borable bushing has a smaller inside diameter (I.D.) to allow a machine shop to bore the  bushing on center to properly restore the center-to-center distance of the large and small ends  of the connecting rod. Honable bushings have a larger I.D., do not correct center-to-center  differences in marginal connecting rods, and must be finished honed to allow for correct pin  clearance.                                                                                                                   Top

  9.What is an underhaul kit?

10.What is a 400 series replacement block?

 If a customer needed a block for a 4010 or early 4020 tractor, Deere & Company® supplied a  replacement block which utilized the late main bearings and cylinder liners, but allowed the  installation of the early cylinder head.                                                                          Top

11.My customers 400 series engine main bearing journals have two drilled holes, but the  Reliance bearings that I supplied him only has one oil hole. Are the bearings mispackaged?

 No. Oil to lubricate the crankshaft is delivered through the hole in the bearing. The second  journal hole facilitates the drilling of the orifice for the piston cooling nozzle during  manufacturing. The piston cooling nozzle receives oil from separate oil passage in the block  that bisects the orifice.                                                                                                Top

12.My customer's 6-404 engine only has one O-ring groove in the block. Which O-ring should  he use?

 Reliance liner O-rings are made of two different materials: Duro-Silicon (orange) and  Duro- Viton (black). The Duro-Viton material has a higher heat resistance, so your customer  should use the black liner O-ring. Beware of competitive O-rings. Many utilize a black Buna
 material which is an inexpensive and inferior substitute for Viton.                                    Top

 13.Why do the connecting rod bolts (capscrews) and cylinder head bolts need to be replaced  every time they are loosened in Deer & Company® engines?

 The rod and head bolts are designed to stretch when they are properly torqued. If the bolts are  re-used, proper clamping pressure cannot be achieved, and a bolt failure could result.     Top

 14.Where do the thrust washers fit in the engine?

 On 300 and 400 series engines, the washers fit on both side of the block web, and on the rear  (flywheel side) of the cap with the slotted face towards the crankshaft. On 500 series engines,  the washers fit on both sides of the cap, and on the rear (flywheel side) of the block web with  the slotted face towards the crankshaft.                                                                         Top

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