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2023年2月16日星期四

How to Deal Hino Drive Shaft Failure

    How to deal hino bus drive shaft failure

Symptom:
Abnormal vibration
when driving



Possible cause :
Looseness of universal joint yoke and
flange tightening nuts.
Excessive propeller shaft runout Worn or damaged universal joint Incorrect phasing of the yokes


Remedy/Prevention:
Tighten the nuts.
Rpl
Replace the universal joint.
at tephasingarrsrretly.


PROPELLER SHAFT:





IMPORTANT
POINT-DISMOUNTING DISCONNECT THE PROPELLER SHAFT FROM THE FLANGE ON THE DIFFERENTIAL AND TRANSMISSION.
1.Draw the match marks on the flange and yoke.
2.Remove nuts and bolts.



IMPORTANT POINT-DISASSEMBLY DISASSEMBLE THE UNIVERSAL JOINT.
1.
Remove the retainer ring from the yoke.
2.
Position the yoke under the arbor press and push universal joint partially out of the yoke lug.
The bearing is protruded from the yoke.
3.
Place the propeller shaft assembly in a vice, gripping protrud-
ing bearing with vice. Tap on the yoke in area shown to achieve removal of universal joint bearing.
4.
Place the yoke under arbor press with opposite side of universal joint spider in up position and place small push tool on the universal joint spider end.
5.
Press the opposite bearing out of the yoke lug.
6.
Remove the spider from the yoke.
7.
Remove the bearing from the yoke lug.
NOTE: Keep the original location of the bearings, thrust washers, spider and retainer rings in mind. These parts have to be replaced in the same position as before disassembly when re-assembly.



DISASSEMBLE THE DUST SEAL.
1. Remove the sliding yoke.
2. Remove the dust seal.



IMPORTANT POINT-ASSEMBLY ASSEMBLE THE UNIVERSAL JOINT BEARINGS.
1. After the universal joint bearing assemblies are thoroughly clean, apply clean lubricant to the rollers.
2. Check each bearing for missing rollers.
NOTE: Remove the stale grease from the bearing cage. Lubricate grease containing molybdenum disulfide on the needle roller, seal lip and the both surface of thrust washer.



INSTALL THE SPIDER AND UNIVERSAL JOINT BEARINGS INTO THE YOKES.
1. Put the spider into the yoke and then set the universal joint bearings on the yoke.
NOTE: When assembling the universal joint spider to the sliding yoke, position the lubrication fitting so that it is to the yoke side as shown in figure.


2.Press the universal joint bearings into the yokes.
NOTE:O Play attention not to damage the seal lip of the universal joint bearing when installation.
o Align the phasing arrow on the universal joint yoke and the phasing arrow on the sliding yoke.



CHECK THE STARTING TOROUE OF THE UNIVERSAL JOINT USING A SPRING BALANCER.
Assembly Standard:15-50 kg-cm(13-43 lb. in)
1. If the torque is below 15 kg-cm(13 lb. in), replace the thrust washer to the thicker one.
2. If the torque is below 50kg-cm (43 lb. in), replace the thrust washer to the thinner one.



ASSEMBLE THE SLIDING YOKE AND PROPELLER SHAFT SUB ASSEMBLY.
1.Remove the stale grease from the spline of the propeller shaft.
2.Install the new dust seal on the shaft by pushing it in the seal groove.
3.Apply the grease containing molybdenum disulfide on the spline and sliding area of the dust seal.



4. Align the phasing arrow on the shaft sub assembly and the phasing arrow on the sliding yoke.
5. After assembling the propeller shaft, check the phasing arrow as whon in the figure.
6. Adjust the direction of lubrication fitting for sliding yoke side and propeller shaft side as shown in figure.



IMPORTANT POINT-MOUNTING CONNECT THE PROPELLER SHAFT TO THE FLANGE ON THE DIFFERENTIAL AND TRANSMISSION.
1.Align the match marks on the flange and yoke.
2.Tighten the bolts and nuts.
3.Lubricate the universal joints and sliding spline.
Grease:Refer to recommended lubricants list.



2023年2月3日星期五

How to reassemble yanmer marine diesel engine fuel injection pump

yanmer 3JH2 Series Reassembly of fuel injection pump

 

 Preparation:

  After inspection, put all parts in order and clean.
See Inspection of Fuei Pump for inspection procedure.
(1) Put in the plunger barrel from the top of pump.

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NOTE: Make sure the barrel key groove is fitted properly to the barrel stop pin.
(2) Place the delivery valve assembly, packing, spring and stopper from the top of the pump, in that order.


NOTE: Replace the delivery valve packing and O-ring.

(3) Place the control rack, and tighten the control rack stop bolt.




NOTE: 1. Do not forget the rack aux. spring.
2. Make sure the rack moves smoothly through a full cycle.
(4) Piace the rack set screw (using the special tool) in the rack stop bolt screw hole to fix the rack.
(5) Looking from the bottom of pump, align the match marks on the rack and pinion.
Control ck Pincti




(6) While holding the pinion with one hand and keeping it aligned with the match mark, fit in the sleeve, and light-
ly tighten the small pinion screw.





NOTE: Fitting of sleeve; Face towards small pinion screws and align with match mark.
Pinion/sleeve match mark Match mark




(7) Mount the plunger spring upper rest.








NOTE: 1. Be sure to mount the upper rest with the hollow side facing down.
2. Recheck to make sure that the rack moves easily.
(8) Mount the plunger spring.
(9) Mount the lower rest on the head of the plunger, and fit the plunger in the lower part of pump while align-
ing the match marks on the plunger flange and the sleeve.











 
NOTE: If the plunger is mounted in the opposite direction, the injection volume will increase abnormally and cannot be adjusted.

(10) Insert the plunger spring support plate between the plunger spring seat B (lower) and fuel pump, by put-
ting the handle of a hammer in the lower part of pump and pushing the roller guide up.






NOTE: 1. Face the roller guide stop groove upwards, and align it with the stop screw hole on the pump.











2. Check the movement of the rack. The plunger spring may be out of place if the movement is heavy -insert a screwdriver and bring it to the correct position.
3. When replacing the roller guide assembly, tit shims and lightly tighten: Standard shim thickness
1.2 mm (0.0472 in.)
Part code number
129155-51600
(11) Make sure that the roller guide stop groove is in the correct position, and tighten the roller guide stop bolt.






(12) Fit the bearings to both ends of the camshaft, and in sert from the drive side by tapping lightly.




NOTE: Turn the pump upside down, and tap in the cam-
shaft while moving the roller guide to the plunger spring side.
(13) Fit the oil seal on the inside of the bearing retainer and mount the bearing retainer.








NOTE: Coat the camshaft and oil seal with oil to prevent the oil seal from being scratched.
(14) Fix the pump, lightly tap both ends of the cam shaft with a wooden hammer, and adjust the cam shaft side clearance with the adjustment shims while checking with a side clearance gauge.

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(15) Mount the fuel pump side cover.
(16) Tap in the camshaft wood ruff key.
(17) Turn the camshaft, and pull out the plunger spring support plate.



NOTE: Fit double nuts to turn the camshaft.




(18) Tighten the delivery valve retainer.


NOTE: 1. Tighten the retainer as far as possible by hand-
if the bolt gets hard to turn part way, the packing or delivery vaive are out of place. Remove, cor-
rect, and start tightening again.
2. Overtightening can result in malfunctioning of the rack.
(19) Fit the delivery retainer stop and tighten the stop bolt.


(20) Mount the fuel feed pump


NOTE: Refer to the instructions for reassembly of the fuel feed pump.

2023年1月23日星期一

John Deere Engines Piston and Connecting Rod Installation Guide

 John Deere engines   piston  and   connecting rod installation Guide


NOTE: Pistons must be installed in the cylinder liner
from which they were removed.



1. Coat pistons and rings with clean engine oil. Install
pistons in liners, using JDE84 piston ring compressor.
NOTE: Make sure that “FRONT” mark (A) on the top of
each piston faces toward front end of cylinder
block.

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2. Push piston down until top ring is in liner.

 

 

   3. Install bearing inserts, making sure small tangs (B) on
each half of the inserts fit in recess of rod and cap.

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4. Install cap so that large slot in cap (C) fits large tang
(D) on connecting rod.


5. Dip NEW connecting rod cap screws in clean oil and
tighten them alternately to following torques:
IMPORTANT: NEVER use connecting rod cap screws
more than once.
• 3029, 4039 and 6059 engines:
Initially tighten cap screws to 56 N·m (40 lb-ft)
• 4045 and 6068 engines:
Initially tighten cap screws to 66 N·m (50 lb-ft)


6. Torque-turn all cap screws 90—100 degrees. (See
next module).
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2023年1月6日星期五

Cummins Fire Pump Drive Physical Engine Installation Guide

 This article mainly introduces  CFP83 SERIES Fire Pump Drive  Physical Engine 

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Installation Guide
Location
Refer to Drawing CFP83 GEN in Section 13 for the general fire pump and engine layout.
Refer to the following drawings in Section 13 for the general fire pump engine power module assembly:



WARNING Do not operate a diesel engine where there are or can be combustible vapors. These vapors can be sucked through the air intake system and cause engine acceleration and overspeeding, which can result in a fire, an explosion, and extensive property damage. Numerous safety devices are available, such as air intake shutoff devices, to minimize the risk of overspeeding in which an engine, because of application, might operate in a combustible environment (from a fuel spill or gas leak, for example).
Cummins Engine Company, Inc. does not know how you will use your engine. The equipment owner and operator, therefore, are responsible for safe operation in a hostile environment. Consult your Cummins Authorized Repair Location for further information.
Install the fire pump engine in a sheltered environment protected from extremes of weather. Any enclosure must protect the water supply from freezing. Ensure that the engine and electrical components are not exposed to significant water dripping or sprays. Avoid installation in a dusty or dirty environment. Provide adequate physical protection from other physical damage as may be present in the specific location. (Refer to National Fire Protection Association NFPA20-2003 Chapter 11 for additional installation requirements for installations in the USA.)
Design the installation to meet the engine's mounting requirements. Refer to General Engine Data in Section o. Install the engine on a stable level foundation that is designed for the load and vibration of pump operation.
Install the engine with ample room for servicing of the engine, the pump, fuel supply, and support systems.
Ensure that the engine location is free of any risk of exposure to combustible vapors.

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Physical Installation
Use the supplied lifting hooks on the engine to
position the engine.
Provide engine support as required to support
the wet weight specified in General Engine
Data in Section 10.
Position the engine as required for the interface
with the pump, piping, and electrical
connections.
Level the installation with shims as required.
Secure the engine to the support or floor.
Connect the exhaust piping


2023年1月3日星期二

Bobcat STEERING LEVERS Removal and Installation Guide

                              Bobcat 741_742_742B_743_743B_743DS STEERING LEVERS
Removal and Installation guide


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NOTE:      Early production machines used 3-piece assembly.
Current production machines use 1-piece shield which
must be removed as a unit.
Remove the front panel

Remove the bolts and remove both side shields 00.


Remove the bolts from the steering lever shield (g & [Q].


Remove the steering linkage at the steering levers

Disconnect the auxiliary linkage from the right steering lever
lID


Remove the bolts (Item 1) from the pivot bearings 'Cl.
Installation: Tighten the bolts to 25-28 ft.-Ibs. (34-38 Nm)
torque.


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Remove the steering lever assembly @.


Repairing the Steering Levers
Remove the rubber bushing and the Teflon bushing from the
steering levers.
Install the new rubber bushings into the steering levers using
two sockets and a vise ~l


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Install the Teflon bushings on the steering levers [!!).


Install the two steering lever assemblies together ~.
Check the pivot bearings and replace as needed.


2023年1月1日星期日

JCB Excavator 3CX 4CX Changing the Oil and Filter Guide

                       JCB Excavator 3CX 4CX  Changing the Oil and Filter Guide


When draining JCB 760 Series Powershift gearboxes it is
recommended that the oil is drained through the cover plate
A to make sure that the debris collected in the transmission
sump is flushed out. Draining oil through the sump plug will
filter oil through the strainer and not flush out the debris.


                                 WARNING!
Make the machine safe before getting beneath it. Lower
the attachments to the ground; engage the parking
brake; remove the starter key, disconnect the battery.


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 1 Park the machine on firm level ground, apply the park
brake. Lower the loader arms, open the engine bonnet,
raise the loader arms and fit the safety strut. Lower the
excavator to the ground, switch OFF the engine and
remove the starter key.
2 Apply the parking brake and disconnect the battery,
remove the engine side panels.
3 Place a container of suitable size beneath the
transmission to catch the oil.
4 Remove bolts B. Pull off cover plate A and gasket C,
allow the oil to drain into the container. Be aware that
the oil may be hot.
Note: When the cover is removed oil will gush out. Keep to
one side when you remove the cover plate.


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5 Fit cover plate A and a new gasket C. Apply JCB
Threadlocker and Sealer to bolts B before fitting them.
Torque tighten the bolts to 28 Nm (20.5 lbf ft.).
6 Unscrew and remove the filter D. Fit the new filter:
6.1 Smear seal E with transmission oil.
6.2 Screw the filter on until it just contacts the filter
head.
6.3 Turn the filter at least another 3/4 of a turn.
7 Fill the system with new oil through the dipstick/filler F.
Do not fill past the top mark on the dipstick.
8 On completion check for oil leaks.
Note: Fit only a genuine supplied JCB filter, otherwise
damage to the system may be incurred through
contamination.

2022年12月28日星期三

John Deere engines Connecting Rod Bushing Replacement(TAPERED PIN-END CONROD) Guide

John-Deere30294039-40456059-6068-Engines Connecting Rod Bushing Replacement(TAPERED PIN-END CONROD)


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Using JDG738 Connecting Rod Bushing Service Set,
proceed as follows.
1. Slide driver JDG738-1 (A) into one side of rod
bushing (C). Turn driver until taper on driver flange
matches up with taper on bushing.
2. Install receiver cup JDG738-3 onto opposite side of
rod bushing.
NOTE: Stud in cup keeps rod properly located on the
cup. Use JDG738-2 pilot ring (B) as a hollow
spacer when pressing bushing out of rod.
3. Using hydraulic press, push bushing out of rod until
driver and bushing fall into receiver cup



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4. Slide bushing (A) onto JDG738-1 driver (B) and
install JDG738-2 pilot ring (C) onto O-ring end of
driver.
5. Apply TY6333 grease* to:

 Outside diameter of bushing

Outside diameter of pilot ring

Inside diameter of rod pin bore




6. Insert driver into rod pin bore so pilot ring pilots in rod
bore and bushing taper aligns with taper on driver
flange. Align oil hole in bushing (D) with oil hole in end
of rod (E).
7. Install JDG738-3 receiver cup (F) onto opposite side
of rod so taper on rod aligns with taper on receiver cup.
8. Press bushing into rod until edge of bushing is flush
machined surface on connecting rod face.
IMPORTANT: Oil holes MUST be aligned. If holes are
not aligned, remove and discard
bushing then re-install a NEW bushing.
DO NOT attempt to reuse a bushing.
9. Have the new bushing reamed by a specialized
workshop to obtain an oil clearance of 0.020 to 0.056
mm (0.0008 to 0.002 in.) with piston pin.

How to relieve hydraulic pressure in the hydraulic circuit of a CAT excavator.

  How to relieve hydraulic pressure in the hydraulic circuit of 312D2 and 313D2 excavators   Steps to relieve pressure:   Caterpillar ET 202...