How To Change Oil Pump On A 2005 Electra Glide Ultra. Claic 88 Cubic Inch Motor

The Harley-Davidson Twin Cam are motorbike engines made by Harley-Davidson from 1998 to 2017. Although these engines differed significantly from the Evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were outset released in 1936, they share a number of characteristics with well-nigh all previous Harley-Davidson engines. Both engines accept two cylinders in a 5-twin configuration at 45°, are air-cooled (some touring models use liquid cooling for the heads),^[1] and activate valves with push-rods. The crankshafts have a single pin with a knife and fork organisation for the connecting rods. These are sandwiched between a pair of flywheels.

The Twin Cam was the second engine from Harley-Davidson to use two cams to drive the valvetrain, the first being the JDH racing model introduced in 1928.^{[2] [iii]}

The Twin Cam 88 was released for the 1999 model year in September 1998.^[four] The Twin Cam 96 was released for the 2007 model year.^[5]

88B and 96B Engines [edit]

The Twin Cam initially was not used in the Softail model family unit earlier the yr 2000. This was due to the chassis design and vibration transfer to the Softail frame as a result of the straight (hard) mounting of the engine. Dyna models are "prophylactic mounted", damping the majority of vibration transfer to the frame and rider. Another reason was that the engine and transmission on a Twin Cam are directly bolted (but are still split up units) to each other, with the chassis seat post on a Softail getting in the way of a Twin Cam transmission case. Equally the visitor determined that a safe-mounted Softail would impact the line's visual styling, Harley solved the consequence by designing an engine variant known every bit Twin Cam 88B.^{[6] [seven]} It is basically the same engine every bit the original (now retroactively referred to past enthusiasts every bit "Twin Cam 88A"), but with a modified engine block design that incorporates twin concatenation-driven balance shafts.^[eight] The Twin Cam 96B engine was released at the same fourth dimension equally the Twin Cam 96A model, for the 2007 model year, and was equipped on all Softail models until information technology was replaced past the 103 ci version.^[9]

It is possible, however, to mount a regular Twin Cam motor to a pre-2000 Softail (or any chassis that accepts an Evolution engine) through tertiary-party adapters.^[seven]

Differences from predecessor (Evolution engine) [edit]

The engine blueprint differed considerably from its predecessor the "Evo" although it shared some design elements with the Sportster line. The 88 represents the displacement in cubic inches of the standard engine. The diameter is 3.75 in (95 mm) and the stroke is 4.00 in (102 mm), pregnant the deportation is 88 cu in (ane,450 cc). The Twin Cam 95 was introduced with the Screamin' Hawkeye (Later known as CVO) Models and ran until the 88 was discontinued later 2006. The Twin Cam 95 displaces 94.vi cu in (one,550 cc). The Twin Cam 96 displaces 96.7 cu in (ane,584 cc). The visitor released 103 cu in (one,690 cc) for 2010 Electra Glide Ultra Limited models, and later for 2012 Softail models and 110 cu in (1,801 cc) for Screamin' Eagle/CVO Models.

Change	Evo	Twin Cam
Displacement	82 cu in (1,340 cc)	88 cu in (i,450 cc), 95 cu in (1,550 cc), 96 cu in (i,584 cc), 103 cu in (1,690 cc), 110 cu. in. (1,801 cc).
Oil pump	External. Connected through a series of gears.	Internal twin-gerotor. Connected straight to the correct side pinion shaft. This pump is more efficient, maintains a college force per unit area and larger volume.
Cams	Single, with 4 lobes.	One per cylinder, each with 2 lobes. This allows the push button rods to be ameliorate aligned with the rocker arms.
Cam drive	Gears	Silent concatenation. This change was reported as necessary to see EPA noise requirements. Many users installed aftermarket gear driven replacements to increase timing accuracy[10] and to avoid cam chain tensioner article of clothing.
Transmission attachment	Displaced from motor	Transmission casing is attached directly to the engine.
Oil tank	Usually surrounds battery box under the seat.	Below and backside the manual associates (except Softails, which are same equally noted for the Evo)
Combustion chamber	"D" shape	"Bathtub" shape. Allows more efficient combustion and has higher compression.
Spark firing	Wasted spark (both plugs fire at the same fourth dimension). The ignition system uses single roll. Plugs are 14 mm (0.55 in).	No wasted spark. The ignition arrangement employs dual coils. Plugs are 12 mm (0.47 in).
Cooling	Air-cooled	Also air-cooled. Increased cooling fin areas and an oil jet that sprays the lesser of the pistons provide additional cooling capability.

Development [edit]

Development of the Twin Cam started in the early on 1990s, as Harley sought to address problems affecting the previous Development engine, specially structural weaknesses within the crankcase, oil apportionment and leakages.^[eleven] While aftermarket firms such as Southward&Due south Cycle previously responded with stronger crankcase components for loftier-performance Evolutions, Harley went for a completely new design, while keeping the engine fundamentally and aesthetically similar to the traditional 45-degree, air-cooled overhead valve V-twin.^[4]

The Twin Cam just shared 18 parts with its predecessor, equally almost all of the components were unique to the engine. As the name implies, the engine uses 2 chain-driven cams, to comply with EPA noise regulations. The drivetrain was reinforced through a mounting scheme called the "Revised Rear Interface", assuasive the transmission instance to be mounted directly to the rear of the engine, with the master drive and clutch covers playing less of a structural function; this was also partly the reason for Softails not initially receiving a Twin Cam for the 1999 model year.^[eleven]

The early prototype Twin Cam engines had considerable problem with the oiling system. These problems delayed release of the engine as scheduled for the 1997 model yr. When the engines were run, oil came out whatever gasketed joint as well as the breather.^[11] Harley sought the help of Paul Troxler, a young engineer from Southwest Research Plant and eventually the problem was traced to a design which drained the cam instance into the crankcase, and used a single scavenge pump. Due to airflow through ports in the crankcase wall, the cam case was non draining properly. Subsequently much testing, the solution was to seal the cam case from the crankcase and use a dual scavenge organisation, which was incorporated into the engine, rather than as an outboard pump equally used on older Big Twins since the original Knucklehead. However, oil was nonetheless not scavenging properly from the crankcase, and this was traced to an acoustic phenomenon due to the quotient of the scavenge inlet. Restricting the diameter of the inlet, a counter-intuitive solution, solved that problem.^[12]

Notes and references [edit]

1. ^ "Harley Davidson's Liquid Cooled Heads Arrive in the Twin Cooled High Output Twin Cam 103". thekneeslider.com.
2. ^ "The Stuff of Legends: The 1929 Harley-Davidson JDH - Archetype American Motorcycles - Motorcycle Classics".
3. ^ Branch, Ben (May viii, 2018). "Big Carry Desert Racer: 1928 Harley-Davidson JDH Twin-Cam".
4. ^ ^{a b} Denish, D. William (24 Feb 2009). "Twin Cam Engine - Chain Driven Cams And A Twisting Crank". Hot Wheel Baggers. Bonnier Corporation. Retrieved 7 February 2014.
5. ^ "Preview of 2007 Harley-Davidson Motorcycles & New 1584cc Engine". Motorcycle Cruiser. Bonnier Corporation. Retrieved 7 February 2014.
6. ^ Denish, William (24 February 2009). "Twin Cam B-Motor Balancer Mods". Hot Bike . Retrieved 29 July 2014.
7. ^ ^{a b} Petersen, Donny (2011-01-nineteen). "VII". Donny'south Unauthorized Technical Guide to Harley-davidson, 1936 to Present: The Twin Cam. iUniverse. pp. 307–. ISBN9781450267724 . Retrieved 6 March 2013.
8. ^ "The Big 5-Twins Test". Motorcyclist Online. Source Interlink Media. Retrieved 12 Baronial 2013.
9. ^ "Doctor First Examination: Harley-Davidson'south New Twin-Cam 96 Engine and Cruise Drive 6-Speed Manual «  MotorcycleDaily.com – Motorcycle News, Editorials, Production Reviews and Bike Reviews". Motorcycle Daily . Retrieved 12 August 2013.
10. ^ Maida, Chris; Zimmerman, Mark (28 March 2005). 101 Harley-Davidson Twin Cam Performance Projects. MotorBooks International. ISBN0760316392.
11. ^ ^{a b c} Anderson, Steve (August 1998). "Twin Cam 88". Bicycle World. Bonnier Corporation: 34–37. ISSN 0011-4286.
12. ^ Holmstrom, Darwin (October 23, 2004). "The Twin Cam Era". Harley-Davidson Century. Motorbooks. ISBN9780760320730 . Retrieved September 29, 2015.

External links [edit]

• Detailed Harley Twin Cam Engine Animations

Source: https://en.wikipedia.org/wiki/Harley-Davidson_Twin_Cam_engine

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