Cylinder Head Description
The engine is fitted with an aluminium alloy cylinder head, which carries the camshafts, valves and spark plugs.
The cylinder head is cast as a single entity and various components are permanently added after machining.
The camshafts run directly in the cylinder head without separate bearings. Valve clearances are adjusted by
changing variable thickness shims which sit between the valve tappet bucket and the valves.
The camshafts are driven by a silent-type drive chain, via a sprocket bolted to each of the camshafts, using
slotted holes. The use of slotted holes allows the camshaft timing to be adjusted very accurately, to compensate
for manufacturing tolerances in the camshaft drive system.
The chain is guided by two blades and is tensioned by a hydraulic tensioner.
The hydraulic tensioner is fed oil via a gallery in the cylinder head. The combination of oil pressure and spring
pressure pushes the plunger against the tensioner blade which tensions the camshaft drive chain. The hydraulic
tensioner has an oil pressure relief valve located in the plunger that is set to open between 12-16 bar and when
open sprays oil through a drilling in the tensioner blade onto the camshaft drive chain.
Oil is supplied to the cylinder head by a gallery in the crankcase. Once supplied to the head, the oil is distributed
along internal drillings within the cylinder head casting and camshaft.
Single valve springs are used to close both the inlet valves and exhaust valves. These valve springs have close
wound coils at one end to assist in the prevention of valve bounce at high engine speed and to give a smooth
valve actuation. When assembling the cylinder head it is important that the close wound, colour coded ends of
the springs are fitted downwards (towards the piston). Both the tip and seating face of the valves are hardened
to give a long service life.
Due to the methods used to assemble the valve seat and valve guides to the head, these parts cannot be
replaced.
CAUTION
In any of the following operations which necessitate the removal or disconnection of the camshaft drive
chain, NEVER turn the engine without the camshaft drive chain and tensioner correctly fitted and adjusted. In
the disassembled condition, the pistons will contact the valves if the crankshaft is turned, causing severe
engine damage.
Camshaft Drive Chain Tensioner - Removal
WARNING
Before starting work, ensure the motorcycle is stabilised and adequately supported. This will help prevent it
from falling and causing injury to the operator or damage to the motorcycle.
Remove the camshaft cover (see Camshaft Cover - Removal).
Remove the right hand crankshaft cover, noting the position of the encapsulated bolt. Discard the
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Tiger Explorer XR Series
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CYLINDER HEAD
Содержание Tiger Explorer XR 2016
Страница 1: ...2016 2017 Triumph Tiger Explorer XR XRX XRT Motorcycle Service Maniual...
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Страница 58: ...cipf Main Wiring Harness Routing Tiger Explorer XR Series 54 of 746 ROUTINE MAINTENANCE...
Страница 59: ...cjrs ABS and Brake Hose Routing cjma Tiger Explorer XR Series 55 of 746 ROUTINE MAINTENANCE...
Страница 66: ...Exploded View Clutch Cover Tiger Explorer XR Series 62 of 746 ENGINE COVERS...
Страница 67: ...Exploded View Engine Covers Exploded View Sump Tiger Explorer XR Series 63 of 746 ENGINE COVERS...
Страница 87: ...Exploded View Camshaft Camshaft Drive and Valves Tiger Explorer XR Series 83 of 746 CYLINDER HEAD...
Страница 117: ...Exploded View Clutch Controls Tiger Explorer XR Series 113 of 746 CLUTCH...
Страница 170: ...Exploded View Flywheel Sprag Clutch and Starter Gears Tiger Explorer XR Series 166 of 746 TRANSMISSION...
Страница 171: ...Exploded View Gear Selectors and Drum Tiger Explorer XR Series 167 of 746 TRANSMISSION...
Страница 231: ...Tiger Explorer XR Series 227 of 746 FUEL SYSTEM ENGINE MANAGEMENT...
Страница 232: ...Exploded View Airbox Tiger Explorer XR Series 228 of 746 FUEL SYSTEM ENGINE MANAGEMENT...
Страница 234: ...Exploded View Secondary Air Injection Tiger Explorer XR Series 230 of 746 FUEL SYSTEM ENGINE MANAGEMENT...
Страница 354: ...Coolant Tiger Explorer XR Series 350 of 746 COOLING...
Страница 373: ...Exploded View Hand Guards Tiger Explorer XR Series 369 of 746 FRONT SUSPENSION...
Страница 409: ...Tiger Explorer XR Series 405 of 746 REAR SUSPENSION...
Страница 458: ...Exploded View Front Brake Caliper Exploded View Rear Brake Master Cylinder Tiger Explorer XR Series 454 of 746 BRAKES...
Страница 459: ...Tiger Explorer XR Series 455 of 746 BRAKES...
Страница 460: ...Exploded View Rear Brake Caliper Tiger Explorer XR Series 456 of 746 BRAKES...
Страница 548: ...Tiger Explorer XR Series 544 of 746 WHEELS TYRES...
Страница 560: ...Exploded View Cockpit and Mountings Tiger Explorer XR Series 556 of 746 FRAME BODYWORK...
Страница 561: ...Exploded View Mirrors Tiger Explorer XR Series 557 of 746 FRAME BODYWORK...
Страница 562: ...Exploded View Side Fairings Exploded View Sump Guard Tiger Explorer XR Series 558 of 746 FRAME BODYWORK...
Страница 563: ...Exploded View Engine Protection Bars Tiger Explorer XR Series 559 of 746 FRAME BODYWORK...
Страница 564: ...Exploded View Front and Rear Footrests Tiger Explorer XR Series 560 of 746 FRAME BODYWORK...
Страница 565: ...Exploded View Side Stand and Centre Stand Tiger Explorer XR Series 561 of 746 FRAME BODYWORK...
Страница 568: ...Tiger Explorer XR Series 564 of 746 FRAME BODYWORK...
Страница 628: ...Exploded View Headlight Tiger Explorer XR Series 624 of 746 ELECTRICAL...
Страница 629: ...Exploded View Rear Light and Reflectors Tiger Explorer XR Series 625 of 746 ELECTRICAL...