John Deere

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.

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. Most parts do not interchange between Litre and Powertech engines.

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.

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.

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.

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.

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.

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

9. What is a 400 series replacement block?
If a customer needed a block for a 3010, 3020, 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. This way the customer could use his cylinder head with a replacement block.

10. 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.

11. 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. Generally, Viton O-rings should not be used where they will be exposed to coolant and silicon O-rings should not contact lube oil.

12. 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.

13. 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.


1. What is a CPL #?
The “Critical Parts List” is the code used to identify the configuration and series of that engine. It is found on the data plate (usually on the left hand side of the timing cover on most Cummins Engines) and is necessary to determine the correct replacement parts like pistons, and fuel injectors.

2. Why are some C Series Cylinder Kits shown for the same CPL?
In these cases, block marking numbers determine which cylinder kits are required.

3. What is in a Cummins Piston Assembly and how does it differ from a piston kit?
Just like the OEM, B Series piston assemblies come with piston, pin, retainer and piston rings. C Series piston kits include the piston, pin, and retainer – no piston rings.

4. Why do the B Series Overhaul kits come with no piston?
Because there are several dozen possible pistons in standard, 0.50mm and 1.00mm over-size making stocking overhaul kits in every combination impractical. You need only add the correct piston to the Reliance inframe or overhaul kit.

5. Why do Reliance C Series cylinder kits cost more than many competitors?
Because we use bainitic hardened cylinder liners just like Cummins. This process insures the same serviceability and long life as the OE.

6. Many pieces of Case equipment have Cummins engines. How do I determine correct part number?
Please see the equipment section of the Reliance Case catalog.


1. How do I specify parts for Kubota applications and how do I identify the engine?
Please refer to Parts and Service Bulletin

2. What is included in Reliance piston assemblies for Kubota applications?
All Reliance piston assemblies, including those for Kubota applications, include the piston, piston pin, piston pin retainers, and the ring set. In our Kubota piston assemblies, we also include the connecting rod bushing.

3. What is an engine code?
An engine code is assigned by Kubota to identify unique features of an engine built for a specific application or equipment manufacturer specification.

4. Why are there two different sized crankshaft diameters on Kubota crankshafts?
When Kubota engine production went from Tier I to Tier II, they increased the journal diameter on crankshafts. Please refer to the serial number breaks noted in the Reliance catalog and compare to the serial number of your engine to be sure that you order the correct engine bearings.


1. Why do Reliance part numbers differ from Case/New Holland part numbers?
Mose Case/New Holland part numbers are the old Ford part numbers. These part numbers are long and difficult to use. For our Ford/New Holland part number only, we have adopted our own numbering system.

2. Why don’t inframe and major overhaul kits for Ford/New Holland applications not contain the pistons?
Ford/New Holland engines for industrial and agricultural applications are not wet liner engines. They can be rebuilt using a dry sleeve or by installing oversized pistons. To offer pre-packaged overhaul kits that could contain any combination of piston oversizes and bearing undersizes would result in too many part numbers for distributors to carry in inventory. By selling the pistons separately, Reliance distributors can maintain fewer part numbers in inventory and serve customers by grouping the required parts at the time of sale.

3. What is included in a Reliance piston assembly for Ford/New Holland applications?
Reliance piston assemblies for Ford/New Holland applications include the piston, ring set, piston pin, and piston pin retainers.

4. Why do Reliance gasket sets for Ford/New Holland applications cost more?
Reliance gasket sets for Ford/New Holland applications are the most complete in the marketplace and include the highest quality materials. Every gasket set includes all of the gaskets required to complete the job. They may cost a little more, but when compared to the cost of stopping the job because of incomplete gasket sets, they are a very good value.

5. Why are there different reference numbers for the same engine model?
Over time, Ford made changes to engines within the same model. It is important to identify which of these versions is being repaired prior to ordering the parts. Our catalog illustrates the differences to assist in ordering the correct parts the first time.


1. Why does Reliance offer wide and narrow gap rings/cylinder kits for D/DT 414, 436, and 466 engines?
For many years International produced these engines with the crankcase breather located on the block. Engines with the breather located on the block utilize narrow gap piston rings. The only ring that differs between narrow and wide gap ring sets is the intermediate compression ring.

Later, in order to address compaints of excessive crankcase blow-by, International moved the crankcase breather from the block to the valve cover. At the same time, they introduced the wide gap, intermediate compression ring.

Many engines that were built originally with narrow gap piston rings were later retrofitted with wide gap rings and the breather was moved to the valve cover. Please note the breather location prior to ordering parts to be sure that you receive the correct parts for your application.

2. Why does Reliance sell only one oil pump for International applications?
Our research suggested that there was not sufficient demand in the aftermarket to justify the tooling and inventory investment required to develop the other pump.

3. Why does Reliance offer narrow and wide crankshaft main bearings for International applications?
The early 414, 436, and 466 International engines were manufactured using narrow bearings. Later, International introduced wide journal crankshafts for those engines, which required a wider bearing. The thrust bearing is the same for narrow or wide bearing crankshafts. Many engines built originally with narrow bearings were later upgraded to wide bearing crankshafts. Please refer to the Reliance catalog for bearing sizes and check carefully before ordering parts.