Valve Body Inspection & Reaming for Repair

• Centigrade/Celsius to Fahrenheit:（C x 1.8）+32=F
  
• Fahrenheit到Centrigraces / Celsius：（f - 32）x .555 = c
  

• 巴至磅/平方英寸：条x 14.5 = psi
  
• psi到酒吧：Psi x.06895=巴
  

• 每分钟升每分钟加仑加仑：l x .2642 = g
  
• 加仑每分钟到每分钟升的升：g x 3.7854 = l
  

• 毫米到英寸：mm x .0397 =英寸
  
• 英寸到毫米：inch x 25.4 = mm
  

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OE阀到孔的耐受性

Hydraulic valves must stroke in order to control fluid flow. Minimal valve to bore clearance is required to allow movement and to seal circuitry. That clearance, allows for a minimal oil film to support the valve during the stroke. The casting being porous helps to retain this fluid. The specification for total diametrical valve spool to bore clearance is . 0005” minimum to .0016” maximum. (.0127mm–.040mm) In comparison, a human hair is typically .0034” (.086mm) and a piece of paper is .0045” (.114mm). A particle of contamination that is larger than this clearance, can become imbedded as it travels with the valve and can score the softer of the two surfaces. The sharp edge on the valve is designed to act as a wiper to push the particles before they imbed and cause the valve to stick.

The pump and main pressure regulator valve are the heart of the hydraulic control system. Pressure and flow of circuits downstream of the main regulator valve, are dependant on it’s position. Hydraulic circuits currently use primary and secondary regulator valves. The primary limits line, which feeds clutch circuits and opens a path to charge the converter. The converter has a lower priority and a reduction in flow due to the valve movement to maintain specific regulated line pressure. The regulator spring and additional boost reduce converter charge and exhaust and the balance circuit, increases converter feed and exhaust, which reduces line. In the design of the rotary vane pump, the main regulator valve controls the pump slide position.

Secondary regulators such as the Actuator Feed Limit, Solenoid Modulator, Converter regulator, limit the pressure after them. The concern, is that wear and loss after these regulators, reduces the ability for the TCM to control the electro-hydraulics.

1.5至3.5倍的LED灯、各种检查透镜或阅读眼镜。千分表或单板卡尺作为下垂/挠度测试的测量仪器。计算阀门挠度的程序和公式可在Sonnax网站上找到。为了识别经纱的经期和螺栓张力，可以使用压敏膜。

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一次阀检查

首先检查最活跃的阀门及其孔，从主调节器开始，然后转到辅助调节器。调节阀可以通过油路识别，也可以通过跟踪PWM电磁阀的出口电路来识别。初步要求包括一个干净的拆卸阀体铸件和良好的照明。

孔磨损是最常见和最严重的。拆下阀门后，从流体进入的同一方向观察铸件，并朝相反的方向观察。当表面压力增加径向接触时，阀门将被加载到该侧。当铸件磨损时，会出现一个抛光的新月形区域。一个花瓣的外观，一个可见的步骤或螺旋加工也减少了密封所造成的阀芯。

阳极氧化膜阀可能得分,加工of round or have sharp edges, all of which scuff the casting. If you see wear on an aluminum valve, it has a surface coating rather than a penetrating anodized coating. Some valves may display witness marks from bore wear.

Check valve spools for sharp edges. If finish is irregular, spin within micrometer to check for concentricity. To isolate a bent valve, install into valve body bore and rotate. If it binds during rotation, it is distorted.

捕获空气、离合器压力或湿空气试验（W.A.T.）是使用调节（30-60psi/2/4 bar）空气压力和ATF进行类似试验的说明。OE维修手册中建议对离合器回路进行空气测试，这种情况适用于阀体回路。这样做的好处是，所需的工具最少，泄漏的声音也清晰可见。必须注意的是，该方法需要经验，而目测测试不可测量，只能由操作员进行。最终流体和空气将被迫通过正常的阀孔间隙。夹具可以用来隔离阀门，螺线管可以用来创建测试歧管。

校准的空气测试台可用于表示可测量的损失百分比。这种类型的设备导致可重复的气压测试。

反向锁止孔内侧端磨损。	使用OE，BMW或此Borg Warner TCC电磁阀

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VACUUM TESTING

空气测试板利用受调节的空气供应和蓄电池和校准的压力和流量夹具。请参阅俘虏空中测试站。

In vacuum testing, the casting must be clean and dry, which requires disassembly. With air testing, the unassembled core is bolted to the plate and the leakage is identified before labor is involved. Air pressure enters each valve independently and pushes the fluid out. The amount of stabilized air flow, is monitored on the gauge as a percentage of leakage.

液压试验台设计用于控制阀体并复制泵和功能传输case. Instead of the fluid terminating at the clutch or converter, gauges or pressure transducers are used. The test stand charges the entire valve body and operates each shift and TCC sequence. The hydraulic stand does not pinpoint bore wear, but can identify the loss of gear change or low pressure.

为了确定阀体常见的具体问题，应添加额外的测试点，这些测试点在壳体内无法接近。这些应垂直插入二次调节器下游和电磁阀之后的测试板中。

Examples of secondary plumbing:

GM执行器进料限制电路需要48至52 psi。（3.3-3.5巴）完全行程换档阀门。如果AFL电路具有低PSI或电磁信号压力，则该装置将具有错误的齿轮开始或齿轮丢失。

如果福特4R70W的电磁阀压力过大，它将在4-3降档时处于空档或延迟前进接合。

必须有项目：

• Good lighting
  
• 单独的清洁罐和长凳
  
• 小型车床和压力机
  
• 浮石
  
• Vacuum testing station and regulated air supply
  
• Reaming fixture and fluid circulation tank
  
• 虎钳和装配夹具
  
• 小冰箱
  
• 烤箱
  
• Variable frequency solenoid controller
  

很高兴有以下物品：

• 空气测试板
  
• 液压试验台
  
• 电子模拟器
  
• 超声波清洗机
  
• Oil bath resurfacing stone
  

流程建议：

• 在板凳上有电磁信息和爆炸视图（PC显示器）
  
• 为每个阀体准备重建纸张。提高一致性和跟踪。
  
• Tear down bench separate from reassembly bench.
  
• 选择性零件托盘
  

SONNAX生产了一个阀门身体服务DVD，它检查了铰孔和测试程序，可以在不收取的情况下获得。

铰孔尖端：

• 使用低速空气钻，电动或无绳钻电机转动铰刀。转速为175-225 rpm。2-3磅钻头的内心力量。在钻头和铰刀插座之间使用摆头驱动器适配器。
  
• We suggest mounting the VB-FIX, to a swivel assembly. This allows the casting to be positioned so reaming fluid runs away from other circuits and reduces contamination and cleaning time. The position should be such, that the operator does not exert a side force on the shank.
  
• 用小心夹紧阀体到VB铰孔夹具。使用两个夹具可能会扭曲铸件。这种失真使铰刀粘合和减速或停止切削进展。如果继续，这种失真和装载将导致铰刀钝，最终阀门不会安装。
  
• 对准引脚必须自由在导向器和孔内自由望远镜。如果销根本悬挂，请重新定位轴承板翼螺母，直到它在没有拖动的情况下移动。如果轴承板位置没有释放销，那么再次重新定位阀体。
  
• 铰孔时间取决于去除的材料量。在某些区域，铰刀可能无法像其他区域一样快速切割/向内行走。如果铰刀移动缓慢，不要用力超过2-3磅，因为切削刃处的热量增加，材料会粘在上面。如果切削刃产生刃边毛刺，从刀柄向刀尖方向拉动工具，去除毛刺。
  
• We suggest a reaming fluid recirculation tank, with two nozzles to direct the fluid and flush out chips for an extended reamer life.