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You are here: Home » Service » Service » The Repair Manual of SINOTRUK HOWO HW19710 Transmission 5

The Repair Manual of SINOTRUK HOWO HW19710 Transmission 5

Publish Time: 2022-03-01     Origin: Site

Assemble of HW50 PTO

⑬ Put the needle bearing into the back end hole of input shaft of PTO, align with the

inner hole of spline on the right supplementary axle, and then assemble the input

shaft of PTO to the PTO hole of back shell (see Figure 3-74). Put the paper washer

of end cover on output shaft of PTO, O ring, and then put the front shell of PTO to its

back shell, and its bolt tightening torque is 73-89Nm (see Figure 3-75).

 

⑭Lay grease on the combined face of front shell of PTO, and post PTO paper washer

on the front shell of PTO (see Figure 3-76), and then connect the back shell of PTO

with the front shell, the bolt tightening torque is 41-51Nm (see Figure 3-77).

 

Assemble method of HW70 is similar with the HW PTO; lay seal glue in the middle

of front and back shells of PTO, the most important is the glue shall be even to

ensure the seal interface not to be leak.

Other Parts Assemble.

⑮ Put the filter screen assembly, o ring, end cover of filter screen into the middle shell

by bole, the bolt tightening torque is 21-25Nm (see Figure 3-78), and then tighten

the nut connected middle and front shells in turn. Pay attention to install lifting plate

(see Figure 3-79 arrowed place).

 

⑯Lay the transmission assembly on the plane ground by lifter, and pay attention to

safety and stability. Install the input shaft and stop ring of two supplementary axles

(see Figure 3-80) and its clamp spring (see Figure 3-81).

 

⑰Measure the thickness of input shaft adjustable washer (there are 3 thickness of

washers can be chosen: 0.150.200.25). gently hit the end of input shaft by copper

hammer, let the stop ring of input shaft to be close to the end of front shell, and

measure the distance from the end of bearing of input shaft to front shell by depth

rule, recorded as A (see Figure 3-82); put the paper washer on the end cover of

input shaft, and measure the distance from paper washer to ring ridge of bearing,

recorded as B (see Figure 3-83), and then choose the adjustable washer which

thickness is between B-A-0.1 and B-A.

 

⑱Lay suitable grease on the middle of end cover of input shaft and paper washer, and

put it with chosen adjustable washer into the front shell by order; the thread of screw

must be laid Locitite 242 screw thread tightening glue on, its tightening torque is

41-51Nm (see Figure 3-84); put the end cover of supplementary axle, paper washer

into the end of right supplementary axle, and must lay Locitite 242 tightening glue on

the bolt thread, its tightening torque is 41-51Nm (see Figure 3-85).

 

⑲Lay grease on the relevant combined interface of front shell, and after paper washer

on end cover of supplementary axle and paper washer of oil inlet align with the hole

each other, post them on the front shell. Install the drive top thread of oil pump into

the hole of left supplementary axle (see Figure 3-87 arrowed shown), top thread

align with the gap of oil pump (see Figure 3-87), and install the oil pump assembly

(see Figure 3-88). Notice: there are 3 kinds of oil pump tightening bolt with different

length (including Figure 3-88, the bolt 5 is Q150B1040, bolt 6 is Q150B1090, and

other bolt is Q150B1070), its thread must lay Locitite 242 tightening glue and its

torque is 41-51Nm, among them there are 2 bolts use flat washer, and the screw

shall be laid enough plane seal glue on the bolt (see Figure 3-88, bolt 1 and bolt 4),

others are spring washer.

⑳Insert pipe 2 of gearbox (see Figure 3-89), connect all oil pipe assemblies, and the

tightening torque of hollow bolt is 50±10% N•M, the largest torque is not more than

60Nm (see Figure 3-90).

Connect fork axle with bush assembly to the front shell (see Figure 3-91); put the

fork axle of clutch through the bush hole of front shell, and install flat key (see Figure

3-92), and then pass split fork, fork axle carrier, and connect the split bearing at the

same time and connect left and right connection spring. After the fork axle of clutch

turning agility, then fasten the fork axle carrier; if turning not agility; gently strike the

fork axle carrier. Notice: the screw thread, connected the bolt of carrier of fork axle,

must be laid Locitite 242 tightening glue (see Figure 3-91), its tightening torque is

41-51Nm, and tightening bolt torque of split fork axle of clutch is 21-25Nm, and the

inner hole of complex bush must be laid on enough grease.


Connect the low pressure oil pipe with the split bearing of clutch and front shell (see

Figure 3-93), and install grease mouth (cup) on the front shell; fill enough grease

into the split bearing of clutch by the grease mouth (cup) (see Figure 3-94).

 

Install the paper washer and assembly of small housing onto the transmission

assembly which required shift choice agility. The connected bolt head shall lay

Locitite 242 tightening glue, and its torque is 41-51Nm (see Figure 3-95). Connect

air pipe with the double H valve and range shift cylinder, and pay attention to the air

pipe connection not wrong (see Figure 3-96 arrowed place that is two closed end

connections and two far end connections). Hollow bolt torque is 42±10%N•M.

Install the reverse switcher, neutral switch, pressure switch of range shift on the

small housing, and all the pressure switches torque is less than 35Nm (see Figure

3-96, the arrow directed places of 2, 3, 4, and 5 is reverse switcher, neutral position

switcher, range shift switcher and PTO switcher).

 

Install oil inlet pipe of supplementary gearbox and PTO oil Pipe, M16 hollow bolt

torque is 50±10%N•M(see Figure 3-97). Examine the entire oil pipe to ensure there

are not leak. Install soft axle carrier (see Figure 3-98)

 

After the transmission assembly installation, carefully examine the transmission and

test the signal condition of all the pressure switchers to ensure that there are not any

wrongs, and then equip it with the vehicle.

4. Assemble the Parts of Pull-type Clutch

① After lay suitable Locitite 242 tightening glue on the connected bolt, install the fork

axle on the front shell (such as Figure 3-99 shown).

 

② Let the fork axle pass the fork axle hole, split fork, fork axle carrier in turn and install

flat key on the top key groove and locating. Let the fork axle install to the bottom and

another end equipped with flat key. See figure 3-100.

③ Install the low end elastic ring of fork axle by use circlip pliers( see figure 3-101), and

then fasten the two bolts connected fork and fork axle (see Figure 3-127).

 

④ Install assist cylinder carrier, and finish the assembly of control device of pull-type

clutch as Figure 3-103 shown.

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